Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1bfd8cf6ff4485…

MALICIOUS

PDF

77.0 KB Created: 2021-03-31 06:29:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21dcbc6f11db69a9dd7e1aa104de0f5e SHA-1: e1932df7ab5057c84260940e2fc5247cb58fab5b SHA-256: 9d1bfd8cf6ff44852f2c014da73cc8c9ba19cf2f722b1ce519488f0f833ccc8e
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest the document's primary purpose is to drive traffic to these external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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://lozipotod.ru/123?utm_term=one+america+asset+care+iv+pdf
    • http://zopokujejisolan.getenjoyment.net/54642394669.pdf
    • https://fivubiforozoxi.weebly.com/uploads/1/3/4/6/134676017/bodadowusipika_xavegududitider_xavemulut_kadewavizuwuvaw.pdf
    • http://risumeboze.getenjoyment.net/structural_composite_materials.pdf
    • https://pelefazefipaguj.weebly.com/uploads/1/3/4/8/134892892/dijukafi.pdf
    • https://zowimebewira.weebly.com/uploads/1/3/1/6/131606727/5112638.pdf
    • http://pozijuza.scienceontheweb.net/98569153307.pdf
    • http://tasigezagu.scienceontheweb.net/33779311672.pdf
    • http://vasizazesunof.medianewsonline.com/capacitor_run_motor.pdf
    • http://xunopapazugatar.medianewsonline.com/41217605737.pdf
    • https://geduletulaf.weebly.com/uploads/1/3/4/5/134509924/b2c1e0a1dadd3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zifozujiwi/street_fighter_game_apk.pdf
    • https://uploads.strikinglycdn.com/files/6f1aa59a-f770-4758-9f7a-bb84545bee83/best_free_daw_for_beginners_2019.pdf
    • https://dce579ed-4708-43c3-aaeb-2c76a6268d78.filesusr.com/ugd/944939_c37d48d115724c40bc4aa470a39f9b6c.pdf?index=true
    • https://db244590-af71-4c33-bd6e-2f8f55f31281.filesusr.com/ugd/fdab61_5d4474aadf7f41409238aa8319e8f76d.pdf?index=true
    • http://lawaxisagiwog.atwebpages.com/antibacterial_activity_of_centella_asiatica.pdf
    • https://387a498e-9551-4239-9507-3183ba214552.filesusr.com/ugd/cd403b_50819023dbda42d389fcd0b63650e8bc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7918ab6b-3136-407c-8256-f277cc391b64/sedir.pdf
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_630003663c754ef1b709579e25aa5236.pdf?index=true
    • https://s3.amazonaws.com/fajujiju/calendar_2020_vector_free.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_off0000ee51.bin
46ea60f2e439703f3a422b089cbc35cf69decc73355ce07323273ec2b53627e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE51 5356 bytes
font_01_sfnt_off00010075.bin
91db22d07214747fa4e1e3b29645f629a9a70d5d967327450be78ffcb8a8d84b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10075 11288 bytes

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