Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7cfb9a28401b228…

MALICIOUS

PDF

80.0 KB Created: 2021-02-14 13:19:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 5e23d6b04222c1431a6d1ce01ceea127 SHA-1: c7ab03b391c1a94e390bdfad0a3d60d1d70fec56 SHA-256: a7cfb9a28401b228c58cc7ef664167d5acccb9a54c4ebb0d44d3e4d049373a31
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for brand-impersonation credential phishing targeting Netflix. The document contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to lure users to a phishing page, likely leveraging embedded JavaScript or exploits for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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://kidivine.weebly.com/uploads/1/3/4/5/134576756/7804052.pdf.
  • 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://baarspo.ru/wix?keyword=book+of+nathan+pdf PDF link annotation
    • https://cdn.sqhk.co/mewivupa/dT2xX3k/como_se_dice_ranking_en_aleman.pdfIn PDF document text
    • http://alisaborodaenko.design/75150111729pgnue.pdfIn PDF document text
    • http://klokisik.space/chunar_song_minguidj9.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/FdxSKgi/38674183331.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454966/normal_60010afb8cefb.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/events_and_catering_company_profileqsfct.pdfIn PDF document text
    • http://eliyalte.com/tactics_for_toeic_speaking_and_writing_test_packnxgoy.pdfIn PDF document text
    • https://cdn.sqhk.co/laxefotogulo/QjQ3iiA/jovili.pdfIn PDF document text
    • http://galoomer.online/knowledge_matters_paying_your_taxes_sim_answersoysh6.pdfIn PDF document text
    • https://cdn.sqhk.co/xomorenut/jbijhat/pappu_pari_wala_cartoon.pdfIn PDF document text
    • https://kidivine.weebly.com/uploads/1/3/4/5/134576756/7804052.pdfIn PDF document text
    • https://cdn.sqhk.co/gekobegij/aIgj3Hp/linear_quest_battle_build.pdfIn PDF document text
    • https://cdn.sqhk.co/jogowijalaro/9rIxLHp/jupifuz.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/bisiku/agrisnetodisha_farmer_id_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/4933756519.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/52872667483.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/wozutimek.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_off0000fdc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC2 4936 bytes
SHA-256: 234fcf1a4e099c3b136e6ada2eacedc4e3e9a68ceae32d0a4b1cfce2b994b6bc
font_01_sfnt_off00010e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E97 10644 bytes
SHA-256: b4c0e84904b5ce833e8ada18f00d7cceee784bbbb2ea719112e5ac6de43931a6

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