Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e5284b1098d720…

MALICIOUS

PDF

86.4 KB Created: 2021-08-19 05:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8a6d446812bf9382f4dfec96cb569d71 SHA-1: ff2641da7dcd39fa1b3f2e8133f119be920a4764 SHA-256: 80e5284b1098d720213c83a4aa764ebbefe92299d72c01ba3a11c717414b778c
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs, many of which point to compromised WordPress sites acting as link farms. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to deceive users and potentially compromise their systems.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://huntic.ru/uplcv?utm_term=difference+between+personal+skills+and+professional+skills PDF link annotation
    • http://ristoranteyuri2.com/userfiles/file/tususexudakapigewawanine.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/1fa0fc1208b6f19a97c76f9b33f98824/vifokodagig.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160920e1d6f2c7---lufaxuziwidebuveki.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/ce914b78bc7095f0a49618558a2427f0/mukoxeduzifinuvatosexa.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/35137502201.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/juxolubezopenagig.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/9l0rh6i4ohf73cmos6u8dt5n05/kalinesutigavuxemejerese.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/amgai559pho9emo5hmbpv36pq3/19847195310.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/ec86e9d8c2f1770a335771573cca3dc9/7399068343.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/fisule.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/9sm5bn46badg3cn714utbp59an/batotimixol.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/guwafidemowilep.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/wirit.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/4eff970ad8ab48792a2ad68fc95ca960/vururotodasadunewobukar.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/ec655e561150b8a2e093ae9581408a6c/vaberufisawadujigujaxebu.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/gamokip.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/54648896330.pdfIn PDF document text
    • http://wmehoa.org/clients/d/df/dff1b85474dadb967ea0c40f6d5e37f8/File/11646406734.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5ae32cd99---97428070284.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0161181001622360610.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/rapizesapupifizunuzev.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/742f79aefbf052740bfc5aa0e3fa5bbb/fuzijomimiruwebetikemik.pdfIn PDF document text
    • http://www.bash.cl/media/file/2050142311.pdfIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED15 10932 bytes
SHA-256: d424ff61b9add517f02802cdbaf4fae2565a16d906231c5a115594dc4b4eeb6e
font_01_sfnt_off00010668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10668 16956 bytes
SHA-256: 13037fb75d15ed57fb48fac90178a72538afef7362fb9a36b5e309415bf9a75d
font_02_sfnt_off000132d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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