Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9ffb7d12f4bf544…

MALICIOUS

PDF

82.7 KB Created: 2021-04-08 06:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7666353bb0ed99ca2851a9318e6c31ef SHA-1: d42308299e529f47712d3ff08d7d00114d040461 SHA-256: c9ffb7d12f4bf5446a3455524a72650ef05f243614d2781e4431d24e9d9bc3f0
246 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, and exhibits characteristics of a credential phishing attack impersonating Amazon. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to obscure the ultimate destination. The primary lure directs users to a redirector hosted on weebly.com, likely leading to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://pudakivofuleges.weebly.com/uploads/1/3/4/8/134853743/zasesafi.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://golowaki.ru/wix?keyword=honeywell+security+camera+manual PDF link annotation
    • https://pudakivofuleges.weebly.com/uploads/1/3/4/8/134853743/zasesafi.pdfIn PDF document text
    • https://devogenigibef.weebly.com/uploads/1/3/4/5/134501446/kodevipusigex.pdfIn PDF document text
    • http://ruxuzosok.mywebcommunity.org/83482204959.pdfIn PDF document text
    • https://birobidusizal.weebly.com/uploads/1/3/4/6/134638138/5207204.pdfIn PDF document text
    • https://dixufewopirar.weebly.com/uploads/1/3/0/7/130775961/4248704.pdfIn PDF document text
    • http://vutisonoj.sportsontheweb.net/alcohol_phenol_ether_all_reactions.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/pafofozekejubu.pdfIn PDF document text
    • http://bajoreto.sportsontheweb.net/sepse_neonatal_tardia.pdfIn PDF document text
    • https://kofitabalu.weebly.com/uploads/1/3/0/7/130775223/3180271.pdfIn PDF document text
    • https://bomoturu.weebly.com/uploads/1/3/1/3/131384468/fopesivaju-pemovo.pdfIn PDF document text
    • https://dopotalufiru.weebly.com/uploads/1/3/4/6/134601398/57618b3a.pdfIn PDF document text
    • https://tirepululavapiw.weebly.com/uploads/1/3/4/5/134576363/vorasopigurako.pdfIn PDF document text
    • https://cdn.sqhk.co/xujurovemu/Jidicgd/46541998983.pdfIn PDF document text
    • https://cdn.sqhk.co/nigulavax/ijjdian/xoxemepubitofibosu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xemunebo.atwebpages.com/authentic_leadership_definition.pdfIn PDF document text
    • http://metiguwuwezaza.atwebpages.com/77067898611.pdfIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_4bb12089abc64cd9989d9057a581df37.pdf?index=trueIn PDF document text
    • https://d670dda7-df53-4ef1-8eda-d3256df28744.filesusr.com/ugd/dbbbec_2dc5e5bfde7943aeb08ade532bbd79db.pdf?index=trueIn PDF document text
    • http://teropisarazo.myartsonline.com/45783974174.pdfIn PDF document text
    • http://tuminexozuvino.atwebpages.com/boston_common_map.pdfIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_ffbf6d700f474363a75718a29cb06ac6.pdf?index=trueIn PDF document text
    • http://vusedew.myartsonline.com/buvotivivumalubetuna.pdfIn PDF document text
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_8ca8080e02c149f5898c033f64e4aac8.pdf?index=trueIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/how_to_replace_samsung_galaxy_tab_s2_screen.pdfIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_64e3966dce404699b60678afffdd91ad.pdf?index=trueIn PDF document text
    • http://nubirumoxid.onlinewebshop.net/93032970145.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_off0001081d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081D 5100 bytes
SHA-256: bc9f116f6082d5186d9d4712acfc588f05aa2f46b947d34e4b37a85f535daf0b
font_01_sfnt_off0001197a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197A 10476 bytes
SHA-256: ac7335e3f4d86db096bfff2d264c843a57d3329de6ce25c2b5628eba1ca2e9a6