Malicious PDF — malware analysis report

Static analysis result for SHA-256 116b39f2f7903c68…

MALICIOUS

PDF

96.3 KB Created: 2021-02-21 14:14:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 351558886dcbe6b60a2403f885d269e1 SHA-1: bec453fa4e2d6e38c5f894692715424a60a31889 SHA-256: 116b39f2f7903c68f6dd52a5afd28dc801a9664c6f93e8c4b7634743b32ab52d
186 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, characteristic of a link farm designed to distribute malicious content or redirect users to phishing sites. The presence of external URIs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://bologen.ru/aws?utm_term=deh-x6500bt+manual+espa%25C3%25B1ol PDF link annotation
    • https://cdn.sqhk.co/sisalubitot/j4jggj7/71394559377.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/jiQlSmn/withings_scale_reset_wifi.pdfIn PDF document text
    • https://pevaluxuduta.weebly.com/uploads/1/3/4/5/134502983/zuwixo_gefapiponovo_titovojakokevu_muzegosunab.pdfIn PDF document text
    • https://gafewifem.weebly.com/uploads/1/3/1/3/131379815/nanakevasuzu.pdfIn PDF document text
    • https://nelemiken.weebly.com/uploads/1/3/4/7/134704654/8678056.pdfIn PDF document text
    • https://jofukesor.weebly.com/uploads/1/3/3/9/133999831/zudapabivudimun.pdfIn PDF document text
    • https://fukagopesuzidad.weebly.com/uploads/1/3/1/3/131381553/7839593.pdfIn PDF document text
    • https://javesuput.weebly.com/uploads/1/3/0/8/130873829/14fcf326aab0d1d.pdfIn PDF document text
    • https://mubisajapesufu.weebly.com/uploads/1/3/4/6/134620746/fe5ba2a0.pdfIn PDF document text
    • https://xebuzoxovekig.weebly.com/uploads/1/3/4/0/134018553/4764953.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/XKWkzhj/99433911187.pdfIn PDF document text
    • https://zotorakiv.weebly.com/uploads/1/3/0/7/130739478/nejukakoxi_lifovazeminafuj_zemonovugama_ruvipezuraxuxaz.pdfIn PDF document text
    • https://lamuwopinu.weebly.com/uploads/1/3/4/6/134632291/e32f22ae52c.pdfIn PDF document text
    • https://dumuzuvo.weebly.com/uploads/1/3/4/6/134695275/gawilabapirofawuzawo.pdfIn PDF document text
    • https://pixavegabub.weebly.com/uploads/1/3/5/3/135307945/2462304.pdfIn PDF document text
    • https://finuvowevemez.weebly.com/uploads/1/3/5/3/135397693/limoxe-fonobeviw-takomiweb.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/xutomoxu/48265031592.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/invigilator_interview_questions_and_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001231e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231E 6500 bytes
SHA-256: 782fc2528a6410715f96751a2828cd41cc8593885bc8c22fa0109bf4848d65e6
font_01_sfnt_off0001398e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1398E 5832 bytes
SHA-256: 238cfa2143f7a59f2c7bd8fdd3cc4b9f2f37e5445d61ac0bda9f2982a510e6e3
font_02_sfnt_off00014d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D0E 11456 bytes
SHA-256: 9b17ab274275b1e19e071893a04f189a73b66a59ab6cd121b6d61a8b83ee1654

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