Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac7f1697d0357f5d…

MALICIOUS

PDF

66.6 KB Created: 2021-03-21 00:18:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbe9b78c38974ba0c4bdd178cffbb80d SHA-1: edfddd24d714a0a8879f9df2d56e69346d11ae5b SHA-256: ac7f1697d0357f5d0d1d626a95b2872d1cdc5d4f3f37842b80eabc165d33075d
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'books'. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8429

Heuristics 4

  • 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 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
  • 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://kuzutuzo.ru/aws?utm_term=list+of+all+john+c+maxwell+books
    • http://zebozewazogaso.scienceontheweb.net/jisotupiga.pdf
    • http://palupalukagu.mygamesonline.org/wanijofoxazowibopalezuju.pdf
    • http://gonugotez.22web.org/vigipaxinasonozub.pdf
    • http://gazedalepi.sportsontheweb.net/11793704630.pdf
    • https://segitosul.weebly.com/uploads/1/3/4/8/134886040/metenizejipi.pdf
    • http://instacopyrightcenter.com/best_calculator_app_to_hide_photosb14fb.pdf
    • http://help-feedback-amzn6.xyz/how_to_replace_oven_door_glassaz3ad.pdf
    • https://rugibabolunape.weebly.com/uploads/1/3/1/4/131454120/pokudewaxu_voregipej.pdf
    • http://reestr.site/dirt_devil_vibe_3_in_1_filter9adlg.pdf
    • https://duwafozadujazak.weebly.com/uploads/1/3/1/3/131380008/rubuxexorovosez_xarulozakovi_sinivapobi_xedepanerewaz.pdf
    • https://piwirajaluz.weebly.com/uploads/1/3/5/3/135312697/jigugatamenezovuwu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8860adff-7f0b-4cf3-a358-cdd560dff136.filesusr.com/ugd/625844_efcad4dba3e3406c83381aa30684bb90.pdf?index=true
    • http://boribasumagit.epizy.com/dezurediragekujizomunuw.pdf
    • http://sefazofogizi.epizy.com/bl_theraja_electrical_technology_vol_2_free_download.pdf
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_11ccdebf6a19431a816ae1420b0cedf5.pdf?index=true
    • http://vowojuxibaxo.myartsonline.com/zutoxoxabagutezipisa.pdf
    • http://dexedigobejo.rf.gd/burger_king_breakfast_burrito_nutrition_facts.pdf
    • https://uploads.strikinglycdn.com/files/4785201c-215a-425b-b7ba-9d2459f9d14d/zakuvatigikozutifu.pdf
    • http://litiwevapebani.epizy.com/catalogo_cadweld_espaol.pdf
    • https://uploads.strikinglycdn.com/files/00ca063d-f850-4724-9faf-82b7e081d040/pikexoranexa.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9c3.bin
9c8f8a2e4d753eff9bbd62ec557e3f1e23cc0199a783cd7e3d6f9c5a2c22cc30		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C3 5408 bytes

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