Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0a2c7be2ec67fd…

MALICIOUS

PDF

77.2 KB Created: 2021-05-11 06:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d2f821032527696acf181d71d51dae36 SHA-1: 5817f6549e2664dfa2022916441793f05ea55ca6 SHA-256: 0e0a2c7be2ec67fdc6d9b7790284e39af6624403e64f10f2ae0e66c898ef5660
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs and the nature of the link farm point towards an attempt to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=black+and+decker+cmm1200+parts PDF link annotation
    • http://kujamemapevubu.mypressonline.com/ganiduxodepovuzesodet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463010/normal_5ffd7c48d0759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447280/normal_5fe951b5db073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449417/normal_60107ed28df76.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481155/normal_5fc945b56dae5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486971/normal_603af135d792e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_602026168a46f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371013/normal_6007ea2246431.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/wegoguwuvajejegagodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462775/normal_604e4fbfe5eac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374379/normal_5fc72e5590901.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460680/normal_5ff9df55b47a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_c50f68c391e44f038ca95c2e0f84940b.pdf?index=trueIn PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_45995524bad04315a8b8ff5cf5d0fd90.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/28775830480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c2b5e47-9c41-4f60-b622-9cd080fe9b1c/baxeralu.pdfIn PDF document text
    • https://4b002d3c-a55f-42ce-816c-238f848e88a9.filesusr.com/ugd/3398cc_e7c6b853cbb8458bb82a7c4561a08ee6.pdf?index=trueIn PDF document text
    • https://18cb0a1d-3822-48a5-9ca0-56465202bc9b.filesusr.com/ugd/96564c_0c97c246458a43e287d0bd7f4f32c108.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1f10d55-df6e-4b88-a921-0e5b4a829213/how_do_you_explain_a_rainbow_to_a_blind_person.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/60373276043.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e32b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32B 5288 bytes
SHA-256: 7c0db61658496cea249439e26ed0ba0b45e2a32299853d566a1f42c4d35d9fc0
font_01_sfnt_off0000f504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF504 10260 bytes
SHA-256: 891c9559d00f0000a56e70535eb6298123ccb7cd39f07e2ac105bde842d2ade9
font_02_sfnt_off00011839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11839 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f