Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a69fcd14bd97c5c…

MALICIOUS

PDF

79.2 KB Created: 2021-04-02 22:59:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d6abab2f10c2ac213ca01c8fa717eaef SHA-1: 55429b8e2263ecd8e22de52c934b3ac71404dfe8 SHA-256: 1a69fcd14bd97c5c0a41f54797a6c381c7087692aca2d281e35baa7efae25173
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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=learn+how+to+make+zentangle+patterns PDF link annotation
    • https://cdn.sqhk.co/jefutubup/aijicja/cannonball_run_2_full_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/vapumojemov/wjdggeK/77085285266.pdfIn PDF document text
    • https://laxedojopepab.weebly.com/uploads/1/3/4/8/134896069/majidop.pdfIn PDF document text
    • https://xoxulesajoxe.weebly.com/uploads/1/3/1/4/131438427/3487245.pdfIn PDF document text
    • https://sonikegusu.weebly.com/uploads/1/3/3/9/133997348/6cbe70.pdfIn PDF document text
    • https://bovimifukid.weebly.com/uploads/1/3/4/8/134882826/4548595.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/B3eahcd/fake_caller_app_not_working.pdfIn PDF document text
    • https://dafizigupiteg.weebly.com/uploads/1/3/4/4/134492389/bilifot.pdfIn PDF document text
    • https://cdn.sqhk.co/tabewinudeka/8AF2ih0/dataxak.pdfIn PDF document text
    • https://bijazebis.weebly.com/uploads/1/3/1/3/131382141/c45bea65d7527.pdfIn PDF document text
    • http://kofojoxake.mygamesonline.org/what_is_the_poorest_county_in_new_york_state.pdfIn PDF document text
    • https://kenemujawov.weebly.com/uploads/1/3/4/6/134645985/7485ad.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/4f097547-18ef-4507-bef2-a57fec5931df/ford_mustang_mach_e_gt_horsepower.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/central_limit_theorem_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6a904c8-d990-4536-96b0-14d4924608ad/57481570129.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/28783347798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bec3bb4-e2be-4c70-a28b-9e8e41f32f7f/fifty_shades_darker_movie_download_dual_audio.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/sevozusudafut.pdfIn PDF document text
    • http://niwurekatexo.atwebpages.com/protein_structure_function.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_off0000f6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C0 5380 bytes
SHA-256: 4d68c2431bff7f9b5b8b16859e0f11bfd8f4a89744a9a1824aae04b25d8d292f
font_01_sfnt_off00010904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10904 11404 bytes
SHA-256: 8ae56a2ec9ae1b31536a0f190f7a354a53b3e1e8509e0f374268b3e34405fdac

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