Malicious PDF — malware analysis report

Static analysis result for SHA-256 86701a3b11b1920d…

MALICIOUS

PDF

97.4 KB Created: 2021-07-08 11:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 559cedb4cfca087a297e6926ac5e92fa SHA-1: 03e513dbea8dc0ab8d939918c8625213eea66975 SHA-256: 86701a3b11b1920d63ab13c6f97a633f1bc845087113cdb785450d17206f8d5d
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. It functions as a link farm, containing numerous URLs that point to external resources, some of which are hosted on compromised CMS upload directories. The primary purpose appears to be directing users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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 http://holidayservicemarsala.it/userfiles/files/semesub.pdf In PDF document text
    • http://sugarfree-gelato.com/upload/file/suwowigewami.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/35218759548.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/a8b57c70489146adc331014d5450b1c9/22328179780.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/294554431.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/31868871347.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/7535ab27e7fc3f30f786e740b4816c9d/83173109042.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d48368748---6052833758.pdfIn PDF document text
    • https://tl-systems.hu/files/files/jozofawusoniwusegigim.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///84241703929.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a16d03672af---xomelibenudirajiwapadomo.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/divinovuti.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5862b36ca0---baxeboranomubu.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b824ccca0e---39897760455.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608975a20b76b---95705032773.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a5edb1951d4---33162532828.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/wujalez.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/30187906920.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/vumenobivukozomarujo.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/kinugonarujexazekak.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/vijerozepavekijufibu.pdfIn PDF document text
    • http://billsky.ee/files/file/66217940306.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=yes+dance+of+the+dawnPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF62 19732 bytes
SHA-256: 562040d97d6038bceb840b57c8d47db5c5fb08bca7652426989054d4ddfe8922
font_01_sfnt_off0001328d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328D 16228 bytes
SHA-256: 11c5a07d087146020572b41e3c25cf6f3fd7b709257038c787216a38c3b0495f
font_02_sfnt_off00014874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14874 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001608b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1608B 10404 bytes
SHA-256: ec096e03b5c8e80c2c28445033a95bebea94eac8ba7f244d52d29cf3dda3860c

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