Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa4c1b82a544a964…

MALICIOUS

PDF

83.1 KB Created: 2021-06-26 23:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: cfff2feaae40cabffe757eef795de29f SHA-1: 97b3f15575c58847555ca8cce47f53d8bae02386 SHA-256: aa4c1b82a544a964a70cb19e7e0faaaf338406929739709318048cc2c7873f7d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document functions as a link farm, containing numerous URLs that point to external websites, some of which are hosted on compromised WordPress installations. The primary attack pattern involves luring users to click these links, potentially leading to further malicious content or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://akinmedikal.com/uploads/file/zagesabuxobakobiwo.pdf In PDF document text
    • http://x04ydivan.ru/userfiles/file/riwozegewirusupu.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/raveseguwejufozipu.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/6536745cb62f1fe353df5d3b24069cd0/10165033457.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///93822624614.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2110b028ac---33727979420.pdfIn PDF document text
    • http://oddluzanie.net/userfiles/file/juwuwefazupeves.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04a88c03ab---rakamokugisedibibiriwigo.pdfIn PDF document text
    • https://mimpishio1bet.com/contents//files/44749923791.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/ferogi.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/81d89508cf06cc9ca099fef9049738e6/dafusef.pdfIn PDF document text
    • https://agermag.ro/mm/file/kifojoj.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/37fe645107d1d6957c3e2d8a3dcc77bd/sidagudumisadu.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16073917254a33---16417721530.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffc7dc0585---kabimasitoj.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/426c949b439760e906fc883e58493b29/lemimefatufe.pdfIn PDF document text
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/152c2e6a4785193cca4d7c6ec306f6ed/giluri.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a1c60795d---wefoxofuronulewojip.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/benazubonuvapazitab.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/towupubakejoka.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/87075282351.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202106/file/1624222563.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=handsome+man+dream+meaningPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57F 10436 bytes
SHA-256: ff8d8d5e3f24aeee00e38d711bd4d2c34856dc669e69d5cde6f9d3d89a2b1e60
font_01_sfnt_off0000fcc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC9 16384 bytes
SHA-256: 3e8ca801b9556f6aed60f2120262b315a593c0da491b6eaeb7978550ec450646
font_02_sfnt_off0001273c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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