Malicious PDF — malware analysis report

Static analysis result for SHA-256 211eba2406602b3f…

MALICIOUS

PDF

70.0 KB Created: 2021-02-22 12:44:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 7c03aeb95e37ba376ad3a926d2f7cd2b SHA-1: 39b39de2ac43f2f522826aa29ecfe48a29e417ef SHA-256: 211eba2406602b3f68ae6c3a5f353fa283f9e25ca2a4e61a139c3b42f83242f4
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('baarspo.ru') and another to a potential link farm ('rodsfish.club'). The document body, though heavily obfuscated, contains keywords like 'Nordictrack a2350 not working' and application details, suggesting a lure to a fake support or troubleshooting page. The presence of embedded URLs and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=nordictrack+a2350+not+working PDF link annotation
    • http://rodsfish.club/998985845703ew61.pdfIn PDF document text
    • https://xidumalebuwun.weebly.com/uploads/1/3/4/8/134894794/454e7d.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/auxiliares_del_comercio_y_del_comerciante67v5d.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/gdfnkii/the_sims_freeplay_mod_apk_iphone.pdfIn PDF document text
    • https://linepofikoleku.weebly.com/uploads/1/3/4/4/134492010/tukefipagumuj_letatipen_fafiropug.pdfIn PDF document text
    • https://bifukumuvu.weebly.com/uploads/1/3/5/3/135347201/kifeda-levaviwawu-nodifopubuw-golid.pdfIn PDF document text
    • http://sushibara.net/xfinity._com_errors_xre_10007azo84.pdfIn PDF document text
    • http://tumerasiwabuzip.22web.org/49068404445.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/fJifhaK/vopawoganonun.pdfIn PDF document text
    • http://basvuruizleme.online/jevefaxuwuf09ll2.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/jgijJic/limobuwaj.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/djajdJ1/36800862303.pdfIn PDF document text
    • https://xigefazevape.weebly.com/uploads/1/3/4/6/134632801/tutoxibusunolosozi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vilaxetewutino.epizy.com/all_animal_hd_photo.pdfIn PDF document text
    • http://lugubukegi.epizy.com/33030776615.pdfIn PDF document text
    • http://penabak.epizy.com/xexonig.pdfIn PDF document text
    • http://rimojiruseb.rf.gd/new_assamese_bihu_2019.pdfIn PDF document text
    • http://febefijawifuja.rf.gd/fuxalebelewovokulazope.pdfIn PDF document text
    • http://jopawozav.epizy.com/breville_juice_fountain_juicer_reviews.pdfIn PDF document text
    • http://tinosizifaxuful.epizy.com/renaissance_periodization_diet_template_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_off0000d3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C0 5584 bytes
SHA-256: fb2baa7ab015746d257cbf99e9ea23f0d9e1f8e9bb59497214bd835bac06b06f
font_01_sfnt_off0000e6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F7 10588 bytes
SHA-256: 6ac0869cd9f61be0d45d85f750a0b4c82939b855839365c901f425e2ae9fb21a

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