Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d74197484b6aa2…

MALICIOUS

PDF

72.6 KB Created: 2021-05-28 20:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6e3a51ef8756bb94966311a2fbef5658 SHA-1: 5c0ea622c5864e14482387f624475d77cdc2c80d SHA-256: 47d74197484b6aa24ab5f6da6f0d15f6e2f10906019ed12e8d538c260f0bcc2c
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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://pelibifir.ru/123?utm_term=copperas+cove+police+reports PDF link annotation
    • https://kinamolifurepe.weebly.com/uploads/1/3/2/7/132710726/rofusaruwezi.pdfIn PDF document text
    • https://sapofekotor.weebly.com/uploads/1/3/1/6/131637774/balokiguge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386851/normal_5fc98f04dcc35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379856/normal_603e77258a607.pdfIn PDF document text
    • https://vubufixul.weebly.com/uploads/1/3/4/7/134708570/nirevikelogejo_rokixumagone_busikoxesudobod_tawirafewikib.pdfIn PDF document text
    • https://gejeximiba.weebly.com/uploads/1/3/4/8/134897602/paxotezon.pdfIn PDF document text
    • https://sekirunive.weebly.com/uploads/1/3/4/4/134404638/8de0a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375083/normal_60661c1779c1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409998/normal_5fd122edde87c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373520/normal_604d287415ef8.pdfIn PDF document text
    • https://pobozopidukav.weebly.com/uploads/1/3/4/3/134384736/binedaresa-jitederowanisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373987/normal_600d9c58521e9.pdfIn PDF document text
    • https://voxuvuru.weebly.com/uploads/1/3/5/3/135390020/nibezosatevarak.pdfIn PDF document text
    • https://ludexibof.weebly.com/uploads/1/3/4/6/134638297/8557948.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408482/normal_6064b79764f3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382201/normal_5ffdb711cd31e.pdfIn PDF document text
    • https://wupibivuvofat.weebly.com/uploads/1/3/1/1/131164023/femefebu-wikibuwevowefus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382405/normal_604b42ba618cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386073/normal_600bf3e24312d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459062/normal_603af4d38602d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474722/normal_6014c0f05ab1e.pdfIn PDF document text
    • https://fufaguda.weebly.com/uploads/1/3/0/7/130739251/fofufoto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/816cf805-4b3f-4315-ba63-1bcde33f4018/xifolaxamubukixofodika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c042a33-01ab-41bb-8238-e3e6b97be846/naruto_ultimate_ninja_storm_5_apk__obb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99e8de34-0cb1-4fcd-ac12-65bad7aca28a/michel_de_montaigne_essais_de_la_solitude_analyse.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_off0000dd95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD95 4892 bytes
SHA-256: 31e11b66334d8561ad52079544089c7f080f1748483bdf964b677d176cc7b785
font_01_sfnt_off0000ee46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE46 10844 bytes
SHA-256: 44939c0ce49d1f0f54553bf9bdead46928ae0c04281595d020cdd25b61b607cd