Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f7f828fb5b6add…

MALICIOUS

PDF

78.3 KB Created: 2021-03-29 19:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 39a3c10c67bdb623089d8dfafd44c61c SHA-1: 8d85aeaf25c3930cca9d4de917b6cf049409e891 SHA-256: f2f7f828fb5b6add461df154997d35ee568efbd294974ec9ecba4063f7773c1e
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 0.9998

Heuristics 5

  • 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
  • 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://resalured.ru/wix?keyword=eve+online+beginners+trading+guide PDF link annotation
    • http://tevfikyuce.xyz/13212900602rhbm4.pdfIn PDF document text
    • https://jonipafatanepa.weebly.com/uploads/1/3/2/7/132741476/5502131.pdfIn PDF document text
    • https://detawokigar.weebly.com/uploads/1/3/1/4/131453745/4128458.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393346/normal_6023c91459cf7.pdfIn PDF document text
    • http://reborasiruv.iblogger.org/tell_me_about_yourself_sample_answer.pdfIn PDF document text
    • http://xekedofaki.iblogger.org/english_grammar_aptitude_test_with_answers.pdfIn PDF document text
    • https://zaloposigino.weebly.com/uploads/1/3/0/7/130739621/mibusonapogekil_kagab_xafug_pufubapelapejo.pdfIn PDF document text
    • http://priz24.site/thomas_calculus_2_trke99gra.pdfIn PDF document text
    • https://vamalogobiw.weebly.com/uploads/1/3/4/6/134696595/2273569.pdfIn PDF document text
    • http://esmoney.site/formaldehyde_safety_data_sheet_ukt06b7.pdfIn PDF document text
    • https://wabexerimib.weebly.com/uploads/1/3/0/7/130739061/vidiwikepujitux.pdfIn PDF document text
    • http://frasqen.online/408238395jf7pw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484365/normal_5ffe86c8a78eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dawikoduwegoka.rf.gd/68614906249.pdfIn PDF document text
    • http://murakuxun.epizy.com/abbyy_fine_reader_12.pdfIn PDF document text
    • http://dukojalili.rf.gd/xiketuxorifuzemiren.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cbde247-7570-41de-b2dd-f2300671ebe0/how_to_add_header_code_meta_tags_in_wix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9caebc81-1a17-4364-9100-ad79b1b20c62/41702842379.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_off0000f634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF634 5152 bytes
SHA-256: d505767e04f7d9c63d50abd5755f36c31d9963eeb96ae9eb1e75db07ad76e3c0
font_01_sfnt_off000107cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CC 10740 bytes
SHA-256: 21f0c22aa3e6ee4245b37df7a017db9318a2a920932a9826010ba81a9b7c4b3e

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