Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0247fdbe7dacd45…

MALICIOUS

PDF

80.5 KB Created: 2021-03-22 14:24:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b7354bb682c114689fe5fd6a5778206b SHA-1: bbe8476be58def67b449e1dfafee95b3c3dbcb2e SHA-256: f0247fdbe7dacd457745565dc545885e16d43c9ee9f3f26eba087f3994ced4c5
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The document body, though heavily obfuscated, contains text related to pregnancy tests, suggesting a lure to trick users into clicking on the embedded malicious URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://leonvi.ru/strik?utm_term=what%2527s+the+best+early+detection+pregnancy+test PDF link annotation
    • https://cdn.sqhk.co/wemulekojex/ievhclc/litokalopevalovuxine.pdfIn PDF document text
    • http://tramlaweq.online/max_lucado_devotional_booksjpxu7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473039/normal_6005fd158b66a.pdfIn PDF document text
    • https://cdn.sqhk.co/pufojoloz/jigg4OI/royal_farms_arena_baltimore_maryland_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/lotidonita/ie0lijK/checklist_manifesto_audiobook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458622/normal_60220d2a98729.pdfIn PDF document text
    • https://cdn.sqhk.co/vufebevefo/hfCibGB/34975628405.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368467/normal_602df622636fe.pdfIn PDF document text
    • https://cdn.sqhk.co/vefutifeves/fjdhigc/66118819404.pdfIn PDF document text
    • http://reduslim-siteofficial.site/ne_me_quitte_pas_paroles_explicationqht0c.pdfIn PDF document text
    • https://cdn.sqhk.co/fakameratexe/Ngijcji/canada_food_guide_portion_plate.pdfIn PDF document text
    • http://9gusevshop.website/minetest_server_install_modsz10w3.pdfIn PDF document text
    • http://revershjtb.site/98929541688y7odz.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/KIhg83D/best_zombie_infection_movies.pdfIn PDF document text
    • https://cdn.sqhk.co/miwavilusaji/adSzxhj/sword_of_shadows_5e.pdfIn PDF document text
    • https://cdn.sqhk.co/dofubetu/hqa5gwQ/65951491668.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/savifin/tulegotimer.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/numobesifisokux.pdfIn PDF document text
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_d0db59ab9ad442a8a46cf0d5700e5c35.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zowejunef/94834158140.pdfIn PDF document text
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_d3585224a49645aab0ca403ba94a432e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/waterpik_whitening_water_flosser_wf-06_uk_review.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6B 5412 bytes
SHA-256: 5696254b2ac019c56df36b0df66523732735412a7dbad03dac458b8f58128075
font_01_sfnt_off000100d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D3 10916 bytes
SHA-256: 90a7b65d6bbee90c01c4f162a64176f48678b431ff7d59ed30701356a778c226
font_02_sfnt_off0001261c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176