Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea197a1ecaddac3…

MALICIOUS

PDF

78.8 KB Created: 2021-05-24 23:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 79fd942c1e86910e536accb1041947c9 SHA-1: ddc9e9514d830e1295c571002895d8932d1b99cc SHA-256: 4ea197a1ecaddac30cbd3867ea5d40fb03b2edfe96b40d4bb944e2acbd2b1c70
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link T1071.001 Web Protocols

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains multiple external links, including one impersonating WhatsApp and another related to upgrading a DStv package, suggesting a credential phishing or malware distribution lure. The presence of numerous SEO-optimized links also points towards a link farm strategy to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://xuxijoma.weebly.com/uploads/1/3/3/9/133997678/7cac73e38e.pdf.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jumiwimov.ru/strik?utm_term=how+to+upgrade+your+dstv+package+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369900/normal_606162ad5b0c6.pdfIn PDF document text
    • https://xuxijoma.weebly.com/uploads/1/3/3/9/133997678/7cac73e38e.pdfIn PDF document text
    • https://wujojebexubab.weebly.com/uploads/1/3/1/3/131380870/nisadivipotema-kosuxarasig-sedolevopokex.pdfIn PDF document text
    • https://jekakakum.weebly.com/uploads/1/3/0/9/130969489/vagipug.pdfIn PDF document text
    • https://jizetexosobuwek.weebly.com/uploads/1/3/0/7/130740437/6211861.pdfIn PDF document text
    • https://titapogesasoja.weebly.com/uploads/1/3/1/3/131380181/mozuxavasenitixiti.pdfIn PDF document text
    • https://laxepesijuniz.weebly.com/uploads/1/3/1/3/131383562/c8842.pdfIn PDF document text
    • https://fowaloxew.weebly.com/uploads/1/3/4/8/134881160/vadop_kixopolisinik_wokemafidomekib.pdfIn PDF document text
    • https://malizopal.weebly.com/uploads/1/3/5/9/135962708/dabel_gusufavug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414159/normal_5fecbf9133aa2.pdfIn PDF document text
    • https://jizufuvarax.weebly.com/uploads/1/3/1/1/131164460/modelimoti_pobosagoletuviw_gitudobawem.pdfIn PDF document text
    • https://zoditivifu.weebly.com/uploads/1/3/4/3/134316547/130c9f0bc27b1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486994/normal_5fc8c79eb66a7.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/tufitijinexu/86481866042.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/catholic_answers_eucharistic_miracles.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/12566284428.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/how_to_empty_a_keurig_k40.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/the_giver_chapter_9-11_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/oie_manual_bovine_viral_diarrhea.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/outlook_android_calendar_notifications_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/53293773278.pdfIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/wisenowamotogoxifazize.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/what_are_the_political_boundaries_of_india.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/netekaletinoxese.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/sofenijeginowixe.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/b_m_w_car_pic.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_off0000f3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EE 5520 bytes
SHA-256: 78a5b119f354ff86aa7610fe221d09ccfa40c1c1543cbb9266003a4d1de30760
font_01_sfnt_off000106e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E2 11236 bytes
SHA-256: 260bd527ae3f3c51daaba73613739750787354e479eae1d3a97fa6b4f8765992

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