Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bfcbb2910596220…

MALICIOUS

PDF

73.0 KB Created: 2021-03-05 17:02:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 163c683ea64d8b80a6ac2c948f4223f7 SHA-1: 982a187ace02aefa97d521edc0253a8c6447e640 SHA-256: 4bfcbb2910596220ebcad3edcaf49c636913f7c9105c985bb6f43c57540ee250
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://dugedepap.ru/award?keyword=toner+for+hp+laserjet+1012 PDF link annotation
    • https://cdn.sqhk.co/letonolomo/aXVjeWz/color_sensor_arduino_datasheet.pdfIn PDF document text
    • http://mudixefibewab.mywebcommunity.org/how_to_replace_broken_door_glass.pdfIn PDF document text
    • https://cdn.sqhk.co/bunigenozav/gN2HaLk/95309419248.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529780/normal_60257de4d6a73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459482/normal_5ff00a57c19df.pdfIn PDF document text
    • https://xidumalebuwun.weebly.com/uploads/1/3/4/8/134894794/4f816399f0a.pdfIn PDF document text
    • https://cdn.sqhk.co/tekonunise/hfmiahs/2491772123.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/likazizabuwenuwedetapi.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/e9OJxgc/33318423640.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/VjjsifJ/84996526554.pdfIn PDF document text
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/577c4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489263/normal_5ff6c36289282.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b01031c2-d9f3-44d6-a180-e5f6eb4cc043/nitonexifamewoko.pdfIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_c48b798140854c28943e836f411c5233.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fe30b05-60b5-470e-8376-95cbd0cbd492/m-audio_oxygen_49_3rd_gen_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1e5846c-359b-4a76-a3a7-141a98af3e2b/20205412463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8f80d97-bafd-4b08-b859-9578d20dd5d7/dlink_2750u_as_repeater.pdfIn PDF document text
    • https://66f9c2bc-82a6-463d-9ccd-9c94d3d8805e.filesusr.com/ugd/b361c6_30dba1700ad84ac8a7c25144f506ff3c.pdf?index=trueIn PDF document text
    • http://dogiwexor.myartsonline.com/xerevexidelalidutiw.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_off0000e120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE120 5340 bytes
SHA-256: befce88de720fbe395132e7e3c28067ecf24f0281250089706d225b5e788aeff
font_01_sfnt_off0000f34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34A 10428 bytes
SHA-256: 50b79ce868517e583530725cc01ca726d3df4d75413e81ce47ef2c6329a56bb2

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