Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c4c0311a7f1e14…

MALICIOUS

PDF

80.8 KB Created: 2021-05-20 20:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 515349e4623f4fa21bd9f1f883ee53cf SHA-1: 2b5f39895383cec0b41787deacc72919a4df50c5 SHA-256: 63c4c0311a7f1e1423f8b27991eb33618d524837017b4c2c2f2bc56f36612813
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF document impersonates Instagram to lure users with a fake offer of "5000 followers pro apk mod unlimited coins 2021". It contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection mechanism. The primary intent appears to be credential phishing or directing users to malicious content via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://jipafedi.weebly.com/uploads/1/3/0/8/130813136/24c1ede39.pdf.
  • 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://seumenha.ru/strik?utm_term=5000+followers+pro+apk+mod+unlimited+coins+2021 PDF link annotation
    • https://jipafedi.weebly.com/uploads/1/3/0/8/130813136/24c1ede39.pdfIn PDF document text
    • https://mugafurevokez.weebly.com/uploads/1/3/4/8/134894013/7949591.pdfIn PDF document text
    • https://sagerogokijisoj.weebly.com/uploads/1/3/4/6/134601402/6048381.pdfIn PDF document text
    • https://vifelewumatorav.weebly.com/uploads/1/3/4/6/134669873/sebirunonekuw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496826/normal_5ff563dba05e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484122/normal_5fe5352396cf3.pdfIn PDF document text
    • https://fukuzemuk.weebly.com/uploads/1/3/5/3/135306557/sidegugiw-sinakunu-suxijeparuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501361/normal_5ff0f7c698d5a.pdfIn PDF document text
    • https://nanarazoru.weebly.com/uploads/1/3/4/8/134859944/ba69118.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412403/normal_600ba5afcf7b0.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/kizugokofo/instep_bike_trailer_parts_list.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/telwin_alpine_50_boost_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/aravali_express_19708_platform_number.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/931462043.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/date_sheet_2019_mdu.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/is_a_public_administration_masters_worth_it.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/nesanumupariro.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/45548431071.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/meaning_of_dead_wake.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_off0000fcbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBE 5812 bytes
SHA-256: d7ce526202990ebdc5854278c30a6d648d14d57ed7f6df0a053628da8831d36b
font_01_sfnt_off00011095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11095 10928 bytes
SHA-256: 1b9d9b21de95a58057ea759fc55aa42ba28dea360fed70a797147629ff6a469f

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