Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49bb4bad545a181…

MALICIOUS

PDF

79.0 KB Created: 2021-03-10 17:16:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: edb10096f27ff413db4c8c1a799dba5b SHA-1: b37fe6459b4dcec420e02c0fc568dd3da9824ace SHA-256: a49bb4bad545a1818c8185814fef456355195439fc2411788cbbd0e5a8755b51
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many of which point to an SEO redirector hosted on 'baarspo.ru'. The document body, though heavily obfuscated, suggests a lure related to chemical additives in industrialized food, likely a phishing pretext. The presence of numerous external links and the detection as a phishing trojan indicate an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/award?keyword=aditivos+quimicos+nos+alimentos+industrializados+pdf PDF link annotation
    • http://trylait.pro/489165972866nnbb.pdfIn PDF document text
    • https://fovejurifeke.weebly.com/uploads/1/3/4/3/134342496/tizasutelab.pdfIn PDF document text
    • https://jazasamiwuri.weebly.com/uploads/1/3/4/8/134889091/zerelipepuxofa_nabidijuvagetet_vubapevi_badipi.pdfIn PDF document text
    • http://construt.site/dudasotavexemqq2mm.pdfIn PDF document text
    • http://totalcreditcheck.info/90058185114l38it.pdfIn PDF document text
    • http://inmyshtangen.xyz/kindle_fire_keyboard_caseyg6b1.pdfIn PDF document text
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/d2b02022a6.pdfIn PDF document text
    • http://jaladonubitow.22web.org/loraxipotaludej.pdfIn PDF document text
    • https://likizosuzi.weebly.com/uploads/1/3/4/8/134886942/zixukiteke.pdfIn PDF document text
    • http://tamaxawuw.iblogger.org/86124669367.pdfIn PDF document text
    • https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/natem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zubata/notupodaguvij.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/chitralahari_movie_songs_320kbps.pdfIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_c9dc8411b6234d3498d4ba9f01824d9a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/12021050297.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/putarakozizukawun.pdfIn PDF document text
    • https://c3145b97-73ac-4615-99dc-c7e26a5bcf55.filesusr.com/ugd/7ab50f_a1a5e2518e2846fdb36538f6aaa0d7c7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/leather_card_holder_pattern.pdfIn PDF document text
    • https://4d75d3c9-3a4d-4df6-84ab-e48b83d723e5.filesusr.com/ugd/cdb50c_ec021bcaa01848bbbb94b2cc73f1ad4f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/garorowa/husqvarna_sewing_machines_comparison_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/laminating_sheets_office_works.pdfIn PDF document text
    • http://kubivakov.epizy.com/menejabobovekegatol.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/seventh_heaven_episode_guide.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B8 5528 bytes
SHA-256: 82c494885674b96e828b92a00292e8f021b9381f4121672382ef0668efd24491
font_01_sfnt_off00010678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10678 11656 bytes
SHA-256: 088439e992c5e9ae60f12f6c9904e1fe6d74e4b58a7392465f8cfdc8bda52868

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