Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c8c0b4f1af23892…

MALICIOUS

PDF

83.6 KB Created: 2021-03-22 22:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e0bd580f1fb025b5409ca3fa24ea9fdc SHA-1: 469bbb65b9fd57bc868f61edeaf9f95b04f0755b SHA-256: 7c8c0b4f1af2389265e1499b760d13ed0a4c707a8f236f635768f2db0748a1f1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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=ankhiyon+ke+jharokhon+se+film PDF link annotation
    • https://cdn.sqhk.co/rilowikapaz/Tgigjhb/recharge_pcs_combien_de_frais.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/vojasebabulowoxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373271/normal_601d2fbf52eab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409813/normal_60584515caab9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379500/normal_6046a82eca3e4.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/doigxjb/forward_assault_remix_download_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418963/normal_5fef888494e8b.pdfIn PDF document text
    • http://bawazofo.getenjoyment.net/22380841343.pdfIn PDF document text
    • https://cdn.sqhk.co/xodawakadude/HgcYdvL/dunorufe.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/JLhfIia/vortex_cloud_gaming_account_generator.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/0ggDV8T/893242511.pdfIn PDF document text
    • https://cdn.sqhk.co/bowevuva/jjawkXQ/parent_connectia_app.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://uploads.strikinglycdn.com/files/758419e0-ca3f-4baf-bcb9-f9f3eef87313/zufoverebed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/421160cb-d0bf-4db5-87fb-af439c576759/68147607734.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6514cd23-3f15-47f4-93e6-641b9831ada1/91626375987.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/ninimasuwiz.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/terobadivarum.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/mastermind_use_of_english_answers_online.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/20518554860.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/83362595762.pdfIn PDF document text
    • http://kegigija.atwebpages.com/sibigevudegig.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/how_does_a_leo_man_test_you.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D2 4944 bytes
SHA-256: 562ec7e5c4c962fc2654147348adb22eba1a44d180ec656fad96a6b54fe62836
font_01_sfnt_off0000f16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16E 12656 bytes
SHA-256: ffc894128a6c3cac15496e580ce8c5666f52a664a867ef4587e73c545560e965
font_02_sfnt_off00011bd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD0 16576 bytes
SHA-256: a50fe413b60925e303e590e592c0bf6ee3801923b7d1819f683a5882a1b944c1
font_03_sfnt_off000132ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132AB 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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