Malicious PDF — malware analysis report

Static analysis result for SHA-256 b01a5791b12f6889…

MALICIOUS

PDF

78.3 KB Created: 2021-03-14 07:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a19c0fb4c12566114f37f92033c55343 SHA-1: 1c93373d1350066308809f94b45df79090e4f628 SHA-256: b01a5791b12f68894ee32eaaa435e220ada75b2b0873151e4750d31e1ded46fb
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' point towards a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/award?keyword=beatles+complete+sheet+music+pdf PDF link annotation
    • https://cdn.sqhk.co/gejupajo/goibghi/banco_bradesco_sa_numero_do_banco.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/2HhHjhb/mivokoz.pdfIn PDF document text
    • https://cdn.sqhk.co/xijogedobu/djfqXjc/orange_dream_pastel_clown_ball_python.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/jfjcOih/54808551542.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/Gligjgd/nick_chubb_injury_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/timemowab/jhALhaH/wudotowogeluxem.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/ShjghjH/81328643768.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/6FyPHhh/west_new_york_nj_post_office_phone_number.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_63a4389b2ca64c46b2d35e0d812f147f.pdf?index=trueIn PDF document text
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_8e47ad75d1f34865b9e0f36c45f9f031.pdf?index=trueIn PDF document text
    • https://3437305d-a3f4-4f94-9a63-846dd410f5be.filesusr.com/ugd/ffe76b_198aa4ea81c6491b824021ace0e53324.pdf?index=trueIn PDF document text
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_32b4583d23f441ce8e844d2014be3021.pdf?index=trueIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_f33c00b7bc2c40e7a40b9d5de05e1c39.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/56387585834.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/pride_and_prejudice_movie_2005_where_to_watch.pdfIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_013abba1cc26469d985f169a81fa1120.pdf?index=trueIn PDF document text
    • https://41c240d9-b4af-4f88-8fa4-2a41cce3a287.filesusr.com/ugd/01bc73_ee81d137e4ab46b39be07c5137fbd88f.pdf?index=trueIn PDF document text
    • https://2571d5ef-7130-409a-b87d-c3fd18a83f30.filesusr.com/ugd/71fc55_a3224ac1a4af4141b15ffa29a10af40f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tawovojo/bseap_hall_tickets_2019_10th.pdfIn PDF document text
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_1aa0169ddad74632bf94a0722747debf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/74440098930.pdfIn PDF document text
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_b86c818a30ee4abea35edd1f8e69d055.pdf?index=trueIn PDF document text
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_99a790a298be4f2dab87b5b236ec54a3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/roware/taperujubofewetevetokuzep.pdfIn PDF document text
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_393e38d2d76b4b5fa68aa6c71f59a317.pdf?index=trueIn 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_off0000f4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AD 5348 bytes
SHA-256: 652e02a15d4c317179ff0ebbf100f517110f2f79263608ba2cabb1ede6980637
font_01_sfnt_off000106b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B9 10732 bytes
SHA-256: d1b2a1cf43c683ed5a9e47eedb7ad4122d7c9d992fcb3a9df2be15dbc30c8104

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