Malicious PDF — malware analysis report

Static analysis result for SHA-256 42f82d9b1cf3be13…

MALICIOUS

PDF

85.4 KB Created: 2021-03-09 12:01:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 423a29a1b423ea25e709c0551c5b50d8 SHA-1: 127c90f62a1767f5bb43a56d1b64d9217361d05b SHA-256: 42f82d9b1cf3be131d0aebe732eadb11dc6a4b128c65fcb3ee858b56725df51c
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 0.9997

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://resalured.ru/123?utm_term=highway+bike+race+3d+game++apkpure PDF link annotation
    • http://trendmobile.ru/allopathic_medicine_book_in_bengalin4f59.pdfIn PDF document text
    • http://fupomogusi.22web.org/terminating_employee_letter_template.pdfIn PDF document text
    • http://christinaanddavid2019.com/febelufujalirimixulicueh9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417675/normal_6036f1bc90577.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/bgehgid/77809904059.pdfIn PDF document text
    • http://gomotejux.iblogger.org/tafsir_al_quran_in_bangla.pdfIn PDF document text
    • https://cdn.sqhk.co/giripiponi/FDjNgfr/ps_vita_remote_play_keeps_disconnecting.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458389/normal_5fc9e5c2df5e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380682/normal_5fff4d9c3acb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418786/normal_5fe6a736649e9.pdfIn PDF document text
    • http://antonio-ita.space/mevefapufojuwexopitaxanuvfxhc.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxefoxo/9gdcogj/falling_for_your_fool_s_gold_meaning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384046/normal_604460c10dbb2.pdfIn PDF document text
    • https://cdn.sqhk.co/folikulezig/geriNum/bijixixevijakebon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401691/normal_60172277304dc.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/VZFiehj/28006734204.pdfIn PDF document text
    • https://cdn.sqhk.co/fafegatoko/Gidjdje/dream_boyfriend_maker_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463272/normal_6003a3e727757.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zanutebuxeboluv.rf.gd/83895324745.pdfIn PDF document text
    • http://niginikixino.epizy.com/nitasa.pdfIn PDF document text
    • http://gulavofi.epizy.com/borders_for_word_free.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_off00010e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E86 5800 bytes
SHA-256: 5e2b59ff0941ed3350d3c8808a9e20a8cd24dfc5711c4723245e16c13741669a
font_01_sfnt_off00012230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12230 11068 bytes
SHA-256: 3cf00acf60e94fe62cc777ca0344ed9e72ecd2ecca9d1e218d2f082c2f94cc13

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