Malicious PDF — malware analysis report

Static analysis result for SHA-256 76d68915edac5d0c…

MALICIOUS

PDF

94.3 KB Created: 2021-06-29 04:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2a40bb1d28040155099d2557fd912551 SHA-1: 13acdbed1240699faa8ddd2c32d2b4b0dfc29172 SHA-256: 76d68915edac5d0cc878608f13c69294590a8fd97618947976f7f494a6c7523d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely exploits a vulnerability for client execution. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/07eb2e9356b562789f467b042cad9be5/49459572039.pdf In PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/198213b5867fdc69bf9a8f5933f4d1f7/saboxikagavogepamipaz.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210605_7A9CE91D482776A5.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/vcmr0oq0fdkfpau9i8acktcc8p/82885651590.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/4cdb2219b68a41deea36979a1abc65c8/bupuwufiwuvire.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606cca5281dc4---78318205205.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/39166383199.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15a101d9ec---wixavopi.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/wimuwisatozivewe.pdfIn PDF document text
    • http://novichiha.ru/pic/file/50113836295.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160774ad9da627---sojoxoxokuvawibin.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/68644089252.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/22a31fe2c890b5d4ad32b43dd9a7fb74/22071435111.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/tiwesiniwabunudodonoxan.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/85a8feadb0aaa3cf54f4d90e7b2b00f4/murelipimefune.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d25dfb71d1d---13908158079.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/346a739c764975877dba2c9d59f05307/jedoromaxewusimugaxi.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16076248e889ca---26265986395.pdfIn PDF document text
    • https://samsungdvm.net/upload/ckfinder/files/25740434097.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089543750ff8---1818428966.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/cfef100b3b981bf73392e72c0cc3232c/gegazuvina.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/579bf44ca41d12fa296ad55921cd1c01/69691582258.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/pebibeferofikinu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=the+meaning+of+pouncePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAE 3160 bytes
SHA-256: de1d5c599c9f708f22e4ac3512dab5b03c3fbd35ca97e511cc898d5fedf90820
font_01_sfnt_off0000e993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE993 16824 bytes
SHA-256: e751b1367ed9d9c426c8f4cb99e85b4e54d246fc98ba97cbf6f756614c835f41
font_02_sfnt_off000101d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D1 22704 bytes
SHA-256: 02d2dd82d0e23f1e5680aca921add446cccc3eb2959e02671f448c0748e27ffc
font_03_sfnt_off00013afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00015314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15314 10576 bytes
SHA-256: a0134835b2b4044ac0d793e1044b21bdd6d6c04bdd9e6bd37002d04e92595a5d

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