Malicious PDF — malware analysis report

Static analysis result for SHA-256 420da654e8eca198…

MALICIOUS

PDF

79.9 KB Created: 2021-02-23 14:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bcde1c9730ccb5dee6b12a1da5612e59 SHA-1: e6d9d0ad19e06fc18e31131e5d7226f6ff9f44b8 SHA-256: 420da654e8eca1981cd8f0991a595e2dd6ca9ef2b51ea621c3c0eea7a4d890a2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/123?utm_term=j+cole+first+things+first+rip+uncle+phil PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369923/normal_5ff06f43d19db.pdfIn PDF document text
    • https://zeraxoxuret.weebly.com/uploads/1/3/4/6/134642117/9538672.pdfIn PDF document text
    • http://clyb-wylcan3.space/55395434563psif6.pdfIn PDF document text
    • https://fisuvinu.weebly.com/uploads/1/3/4/4/134497747/8292308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369495/normal_602e65ddee599.pdfIn PDF document text
    • http://women-ita.space/ios_human_interface_guidelines_iconsjhfgv.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/kefaxelipubbln.pdfIn PDF document text
    • http://rat-red.space/blade_of_god_vargr_souls_mod_apk_full6wokb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478655/normal_600281d39ddbb.pdfIn PDF document text
    • https://xaxozugine.weebly.com/uploads/1/3/2/3/132303195/67df323ca.pdfIn PDF document text
    • http://podarokinsta.online/punctuation_marks_worksheets_for_grade_4t5dsr.pdfIn PDF document text
    • http://forpost-electrica.ru/different_types_of_beaks_and_feet_of_birdsj2iz4.pdfIn PDF document text
    • http://burrrhey.tech/sutifebenoluzelilumukinuf9c0b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393181/normal_6024c57ccb135.pdfIn PDF document text
    • http://creamspait.xyz/gadapauy93t.pdfIn PDF document text
    • https://gabodubelekopo.weebly.com/uploads/1/3/4/3/134356924/3590219.pdfIn PDF document text
    • http://itdiscounts.info/android_10_introduces_65_new_emojisa3apg.pdfIn PDF document text
    • http://onsideball.info/95631866861jufhv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/tukexa.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/birthday_wishes_gif_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/sojiwoxizekuj.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/lakijirum.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC52 5056 bytes
SHA-256: dbf7c4dd444b895b193e23a0e1c5216f1b337c1a6f36161cba22540f7c0c249d
font_01_sfnt_off00010d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D87 10924 bytes
SHA-256: 2d749379f10459c068b60984623956c1d4fec59e2c568f2efa639da4ffeaaff8

Open this report in the interactive analyzer, or submit your own file for analysis.