Malicious PDF — malware analysis report

Static analysis result for SHA-256 3212866af2aba17a…

MALICIOUS

PDF

79.7 KB Created: 2021-05-13 22:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 17c1078e1dacf6d980b65e94b03333fc SHA-1: eb7aee0ab78afb1b328245ce994ded978217fdec SHA-256: 3212866af2aba17a83090de5c692b4e44c1231229581c4f50907938746a792ff
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/strik?utm_term=hp+officejet+pro+8620+driver+for+windows+10+64+bit PDF link annotation
    • https://fivoputan.weebly.com/uploads/1/3/1/4/131408393/bemizajokevolisunu.pdfIn PDF document text
    • https://cdn.sqhk.co/xerejijasoma/Ujfgehd/17521473400.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/ijaijid/mezerebogorurepevavufejox.pdfIn PDF document text
    • http://obsluzhivanie-kompyuterov.moscow/mesimisufiwuvozetezowazawk8c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445729/normal_6016790fd6682.pdfIn PDF document text
    • https://sowibize.weebly.com/uploads/1/3/5/3/135348762/8160674.pdfIn PDF document text
    • https://tetemubegogik.weebly.com/uploads/1/3/4/4/134443084/8529073.pdfIn PDF document text
    • http://fexevosekuzavep.iblogger.org/6986956064.pdfIn PDF document text
    • https://cdn.sqhk.co/wozobifanu/Zfshaid/gonijuvudo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463263/normal_5fdd3b073f9ac.pdfIn PDF document text
    • http://eslife.pro/wintoflash_windows_7_bootable_usb_free77zwb.pdfIn PDF document text
    • http://istlan.space/strike_force_kitty_last_stand_unblocked_games_66cx6it.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530846/normal_603896287f8f2.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/HfgdD8N/golden_ball_2020_nominees.pdfIn PDF document text
    • http://pemojubeku.iblogger.org/carpenters_close_to_you_sheet_music.pdfIn PDF document text
    • http://xewixawagupip.iblogger.org/fitaxurovebunefoladop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470016/normal_602d1f3924b10.pdfIn PDF document text
    • https://cdn.sqhk.co/xekejegixawo/qgfihif/forms_of_government_issued_photo_id.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://digotoxijawuta.epizy.com/byron_katie_quotes.pdfIn PDF document text
    • http://dojiseb.epizy.com/58484847449.pdfIn PDF document text
    • http://xelidamos.epizy.com/gigatizifubujatig.pdfIn PDF document text
    • http://mutaloliz.epizy.com/notiwuwikub.pdfIn PDF document text
    • http://pumamolo.rf.gd/hindustani_bhau_status.pdfIn PDF document text
    • http://bofapivumike.rf.gd/vuzulage.pdfIn PDF document text
    • http://sulisufegetu.epizy.com/94252893943.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_off0000f5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FB 6000 bytes
SHA-256: 0c8f58abc394a9e76642caefc1734c9bef230fda9f73aee54d5e672232ad2495
font_01_sfnt_off00010a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A99 10656 bytes
SHA-256: 13592edaa229851acb39ad253e6d2c6ae5f140de2f9606219336ffbbbeb61388

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