Malicious PDF — malware analysis report

Static analysis result for SHA-256 2afc6475f827284f…

MALICIOUS

PDF

77.7 KB Created: 2021-04-03 20:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f8d32a8c4f7e365ba9e8acff30834720 SHA-1: aa39a360f7b2d7f0beaece30333afa1b99fb43a1 SHA-256: 2afc6475f827284fff0f0b50424af9555f5cb3603171586b388103b72634a606
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though truncated and obfuscated, suggests a lure related to a driver's license handbook, which is a common pretext for phishing or malware delivery. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/wix?keyword=texas+driver+license+handbook+2017+spanish PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489733/normal_6061e689ed6da.pdfIn PDF document text
    • http://fuxisileza.mywebcommunity.org/vazovesepunezurivovure.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/hV1BoIZ/controlpro_web_app.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/50389215294.pdfIn PDF document text
    • https://famixupeb.weebly.com/uploads/1/3/4/7/134733803/5d483a58d8a4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403539/normal_6061ec404cbad.pdfIn PDF document text
    • https://cdn.sqhk.co/monazaxumol/rhdjeOS/58089054265.pdfIn PDF document text
    • https://segalupozido.weebly.com/uploads/1/3/0/7/130738693/2c8b07be417b.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/idJmfhc/reluwujinoladakixo.pdfIn PDF document text
    • http://zoxodur.sportsontheweb.net/how_do_i_flip_the_camera_on_my_laptop.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/aMotmBE/53108261362.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzijaxab/o9dHNXP/tennessee_waltz_patti_page_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/higBifC/ai_dungeon_dragon_model_free_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426960/normal_6039e5ead3d20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lugivodunoxasi.atwebpages.com/63671914012.pdfIn PDF document text
    • http://gixiluvigatekij.atwebpages.com/pyridine_alkaloids.pdfIn PDF document text
    • http://xidalagep.myartsonline.com/4055952583.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_off0000f0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B1 5848 bytes
SHA-256: 4d6b84ccc79ede5e7621b7670e30caba7919f0e901cfba38158509a137f6351c
font_01_sfnt_off0001049f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049F 10936 bytes
SHA-256: 61b94b7a7559b37a0a34571109522e368a141583b83f3433789c7185e49ad958

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