Malicious PDF — malware analysis report

Static analysis result for SHA-256 77781c833dc8e514…

MALICIOUS

PDF

113.3 KB Created: 2021-03-14 22:26:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cfe2c641fa6861631e7e43fc09d8dd1f SHA-1: 84808a40c780a099e8a3d544da1f9a12e0e85771 SHA-256: 77781c833dc8e5147523312f87faae1d5c4b340272d2ee9b305fbf90d61cb924
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9993

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://botokaw.ru/wix?keyword=yu+gi+oh+bam+mod+apk PDF link annotation
    • https://lixezakokigek.weebly.com/uploads/1/3/4/5/134596317/gufok_gilufulumipoduk_zirurega.pdfIn PDF document text
    • https://nubugudapo.weebly.com/uploads/1/3/2/8/132814946/kodusalon.pdfIn PDF document text
    • https://xavuzilutose.weebly.com/uploads/1/3/1/0/131070872/nekoni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_6041ea235592a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385863/normal_60192fd7e0038.pdfIn PDF document text
    • https://xoxudepibedewem.weebly.com/uploads/1/3/5/3/135317482/jodegatutuwem.pdfIn PDF document text
    • https://zabavorurexezab.weebly.com/uploads/1/3/5/3/135314693/fopidamosezud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459641/normal_5fd3283a94035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505096/normal_6013e3f4c3948.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://87da31d5-d184-45e7-a456-0ad082c8bd65.filesusr.com/ugd/55e94a_9de9c067281346c792d5adbf8983971a.pdf?index=trueIn PDF document text
    • http://surusulo.rf.gd/7th_grade_glencoe_math_book.pdfIn PDF document text
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_9f1566671fe546e19342db9a7e41eae0.pdf?index=trueIn PDF document text
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_b5803f90f6454e79bc68e18265d9107d.pdf?index=trueIn PDF document text
    • http://vakusidoler.epizy.com/bachna_ae_haseeno_hd_songs_pagalworld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03239bb6-96cc-4984-8c74-28deacdcb141/22927887774.pdfIn PDF document text
    • http://litufowanukoro.epizy.com/subtenant_contract_template_uk.pdfIn PDF document text
    • http://vefimom.epizy.com/the_logic_of_american_politics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc5ec00-3437-4ae4-86df-fb83e2d5b9c6/17240682897.pdfIn PDF document text
    • https://75e6061f-eb7a-4ce8-b546-077bf96366c3.filesusr.com/ugd/2dfd19_194670a284404b32afc7d582ed2785c8.pdf?index=trueIn PDF document text
    • http://bajewilogofiro.epizy.com/mike_holts_illustrated_guide_to_understanding_the_national_electrical_code_2020.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000137d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D3 3036 bytes
SHA-256: 08589576f57b793def3bed37661639593c69393597d613fc0e1ad26012942e12
font_01_sfnt_off0001428f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1428F 5232 bytes
SHA-256: ba95c6cae8967c844fbb2b0b7f9ca8fca1549788d40475b385c4326b9e01a19a
font_02_sfnt_off00015431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15431 5752 bytes
SHA-256: 942d1c38c927c0430b00b4c4cfcb3fbe4040cd08f57a813dd9d6cd5dcb9e224b
font_03_sfnt_off00016847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16847 23336 bytes
SHA-256: dcd74e1fcde287d05e1cd62ae3afdd4582051334b84ee16488a0e16436895cde
font_04_sfnt_off00019f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F67 16780 bytes
SHA-256: 39181e60a6f263dbe2ab2c612d599924a780d7c87eb907c78c346dccfa708c8e

Open this report in the interactive analyzer, or submit your own file for analysis.