Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c074fdb5f684bee…

MALICIOUS

PDF

81.2 KB Created: 2021-03-23 16:35:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6fa30f2a4d86b87cfc9efe50ef50174c SHA-1: 3fd99f6f67b7e41be1fdf8ee42ca20b158da1dd7 SHA-256: 4c074fdb5f684bee5fb6fc761551e83e73391b31decada988935a705cdbb5ea6
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document's content and embedded links suggest a phishing lure, specifically requesting sensitive recovery information like private keys or device codes. The numerous external links, many hosted on disposable domains, point towards a link farm designed to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://ponafet.ru/strik?utm_term=how+do+i+enter+my+device+code+on+facebook PDF link annotation
    • https://tewetakejuduz.weebly.com/uploads/1/3/2/7/132740850/lonaneju.pdfIn PDF document text
    • http://astrohelp.space/vox_ad30vt_manual_espaollf8xq.pdfIn PDF document text
    • http://kamini33.ru/fufidobadkx30q.pdfIn PDF document text
    • http://ig-copyrightnotice.com/oppo_bdp-103_region_free_kitocwva.pdfIn PDF document text
    • https://dosukasexu.weebly.com/uploads/1/3/1/6/131637789/wijiwex.pdfIn PDF document text
    • http://smartcreditcheck.info/29516873268ce2e.pdfIn PDF document text
    • http://ygrash.website/jumping_spider_bite_symptoms_south_africa7v7rh.pdfIn PDF document text
    • https://wogijelagorezu.weebly.com/uploads/1/3/4/0/134096035/sonafanekapudiz.pdfIn PDF document text
    • https://menafemudiwifog.weebly.com/uploads/1/3/0/8/130813668/7299146.pdfIn PDF document text
    • https://dubilovatigalis.weebly.com/uploads/1/3/4/7/134701517/e1307c.pdfIn PDF document text
    • https://xatodibe.weebly.com/uploads/1/3/5/9/135966399/muwinexebelumares.pdfIn PDF document text
    • https://tuvopezape.weebly.com/uploads/1/3/4/7/134712323/1421212.pdfIn PDF document text
    • http://medgaj.com/203118765265zlrn.pdfIn PDF document text
    • https://tatujudipopef.weebly.com/uploads/1/3/4/6/134605081/tofafavuzoniz.pdfIn PDF document text
    • http://xunopapazugatar.medianewsonline.com/35137699404.pdfIn PDF document text
    • http://bigchance.pw/44975162261uslnt.pdfIn PDF document text
    • https://vemegerefawobe.weebly.com/uploads/1/3/2/6/132682093/a08082056291931.pdfIn PDF document text
    • http://dvestideyli.xyz/a_litany_for_survival8q4u1.pdfIn PDF document text
    • http://fresh-ita.space/73709233380fer5x.pdfIn PDF document text
    • https://nezasitize.weebly.com/uploads/1/3/5/3/135303973/dibakibinu-xisonan-tixazelaragig-pobakuzizofamo.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/megujobemegor/what_are_you_up_to_today_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/muzav.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/merge_excel_sheets_using_vba.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/astm_bolt_torque_chart.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/futogojakalewu.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/2012_dodge_avenger_heater_not_blowing_hot_air.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_off0000fe14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE14 5376 bytes
SHA-256: f934a2fa1fc118da520079aefb7d072c98e395ffec09d1f158c58b2314b85933
font_01_sfnt_off00011066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11066 12052 bytes
SHA-256: eb67b8f7d68d64e2e89e29da358a2b1fe96bda6f74b530b52a3e6e382fc365db

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