Malicious PDF — malware analysis report

Static analysis result for SHA-256 d977ec20d0802aba…

MALICIOUS

PDF

76.8 KB Created: 2021-05-06 05:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: e97a2dfbb90ed3a58a0807af1c352190 SHA-1: 2ff6b6f64d9c871cfd570429576ddbf68ad1da74 SHA-256: d977ec20d0802aba070af1ce25e9a08ae67d963bd9a61297306e3cf458a60c67
186 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, containing numerous external URLs pointing to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xajibur.ru/strik?utm_term=2003+dodge+durango+body+lift+kit PDF link annotation
    • https://xedagiwaki.weebly.com/uploads/1/3/1/8/131856626/a6588e.pdfIn PDF document text
    • https://kefuvavubuxega.weebly.com/uploads/1/3/1/1/131164002/wupifabin.pdfIn PDF document text
    • https://kepijifawobi.weebly.com/uploads/1/3/5/3/135388201/4489930.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/joviwutapobiluvarubupof.pdfIn PDF document text
    • https://nobibiraxofos.weebly.com/uploads/1/3/4/9/134904538/derel_xoderav_kawanujilok.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/how_to_start_reading_spider_man.pdfIn PDF document text
    • https://bojebunu.weebly.com/uploads/1/3/0/7/130775379/rijuzupidamisip-bazax.pdfIn PDF document text
    • https://lonamejekewow.weebly.com/uploads/1/3/5/3/135396766/9b7e7ecf3.pdfIn PDF document text
    • http://kavakedego.scienceontheweb.net/70008503593.pdfIn PDF document text
    • https://padukasafif.weebly.com/uploads/1/3/4/4/134404544/zutazagizes.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/gizakevopiwurogi.pdfIn PDF document text
    • https://repemokalit.weebly.com/uploads/1/3/1/8/131856723/9657092.pdfIn PDF document text
    • https://bituvawidosudi.weebly.com/uploads/1/3/6/0/136081872/bexejibibodiluno.pdfIn PDF document text
    • http://fomijegi.mypressonline.com/56092399166.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/davolazupivowi/48478692761.pdfIn PDF document text
    • https://def26600-86c9-4442-a738-094ddf2992d1.filesusr.com/ugd/eb5a6a_637c2343c2e64089903a3693942cec3b.pdf?index=trueIn PDF document text
    • https://18aefb47-0221-41c7-ace0-4f78eb33e730.filesusr.com/ugd/bca722_aa31191ade084adbb567fa7ce063abfa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/259e1e96-0de5-40f9-b328-401e0112664f/gold_gym_xr45_workout_routine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76ebdc41-e2c4-421b-ad5d-366bb2b5702a/how_to_find_the_attitude_of_a_poem.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/57973009386.pdfIn PDF document text
    • https://c38d9960-f3a4-46a0-b266-cfc7836dd0ed.filesusr.com/ugd/a8d9c8_7f55d1c1e13444879c9fa7adb15962c5.pdf?index=trueIn PDF document text
    • https://8ed7ad90-0d0e-491f-9c15-1f6cd5a61d18.filesusr.com/ugd/f1a804_1993a5ca71d04a7bb2d6c9a6ca95344b.pdf?index=trueIn PDF document text
    • https://4edd92ed-4e96-4c3d-a837-a16c7246ae9e.filesusr.com/ugd/7c3149_91efe6f2df564c5f8860ac5b479d5612.pdf?index=trueIn 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_off0000ef81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF81 5544 bytes
SHA-256: 7ce3a49ef383ef91a18d296e16d62d4b16816adf4034dee1b4c2f5c5f4673211
font_01_sfnt_off00010277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10277 10420 bytes
SHA-256: 994adde1cd2e73493fac791da4187bd20117de44f7257f1e6787912d4e5c89be