Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bfd28758fb363b8…

MALICIOUS

PDF

70.1 KB Created: 2021-03-20 12:46:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 809c965418b45f512873134c04894aef SHA-1: d51437417d706680dd90af056f0ad9a65f128fb6 SHA-256: 1bfd28758fb363b8a053bb970bab30ff7e4854bed8103bd8ece8b25bbf11e104
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links to external websites, many of which are structured to appear as search results or document downloads. The heuristic PDF_SEO_LINK_FARM indicates a large number of these links, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/award?keyword=new+bible+commentary+pdf
    • https://lonokowikur.weebly.com/uploads/1/3/5/3/135384913/bojaderut-bakovawelafi-nunex.pdf
    • http://limaxinsto.xyz/wu-tang_an_american_saga_-_trailer_official__a_hulu_originalflm3f.pdf
    • https://warodimaziwini.weebly.com/uploads/1/3/4/6/134611971/bcdd0c80c3b5.pdf
    • http://vilopeg.xyz/what_is_the_tone_of_the_poem_in_a_station_of_the_metrohp5jx.pdf
    • http://stopnutristrike.ru/848563909792k62n.pdf
    • https://lakerevuko.weebly.com/uploads/1/3/4/6/134654656/jovudasisakuz-wubuguvezivuke-sevewakax-benewatuboze.pdf
    • https://xojuliwujugiseb.weebly.com/uploads/1/3/4/3/134388488/pusemaxumeg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4def7632-c3e1-4566-903b-e5f5fcd209ea/partido_pueblo_trabajador_puerto_rico.pdf
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_bbd567439bc44804b0e71be405e8b236.pdf?index=true
    • https://s3.amazonaws.com/zodererezuzuxi/techno_beats_audio_free.pdf
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_19a76eb16f1f4c1d80f5657364f60dab.pdf?index=true
    • https://s3.amazonaws.com/baxunaf/conscious_capitalism_los_angeles.pdf
    • https://s3.amazonaws.com/wanasuvedigo/35368193845.pdf
    • https://s3.amazonaws.com/nerugiraxura/41106239554.pdf
    • https://s3.amazonaws.com/vuzufexarevima/vurunem.pdf
    • https://uploads.strikinglycdn.com/files/43dfd1f9-b019-4307-bfe4-25e32ca9158d/23735413510.pdf
    • https://ebd73b9a-b255-48a5-b781-2bd84b483b4c.filesusr.com/ugd/956c05_04862bec5d324a128bba65ed94e5c069.pdf?index=true
    • https://s3.amazonaws.com/gujutavevive/nipikepotepoxawazid.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d597.bin
0c26d4ae78bbc9bb6ded1c57f8925d8e45590b4ab7dbd6296aacecfae4780d23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD597 5424 bytes
font_01_sfnt_off0000e80c.bin
4eece88d29ffbb416fe98b2668f49f60efbbd79c2ce36a6c3f80ac59c0832c06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE80C 10416 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.