Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa904e00450c60e0…

MALICIOUS

PDF

75.8 KB Created: 2021-03-07 16:01:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: f13a0ed7846a490e0a982879ab7d2984 SHA-1: 37ccd72ba7bf24f6e61ad530fda50f2c68a72615 SHA-256: fa904e00450c60e01b4c176cc42258206de1ea3f28448abc987617cc46b54c57
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect users to a phishing or malware site. The document body, though heavily obfuscated, suggests a lure related to a product, aligning with common phishing tactics.

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://leonvi.ru/award?keyword=asus+rt+n12+wireless+n+router+access+point PDF link annotation
    • https://cdn.sqhk.co/pofevadamem/QIxMkhh/lokicraft_download_in_iphone.pdfIn PDF document text
    • https://luwozupewudaxu.weebly.com/uploads/1/3/1/3/131384663/gefovise.pdfIn PDF document text
    • https://wigimosasalak.weebly.com/uploads/1/3/2/8/132814057/vedebafowil_zinopaxorul.pdfIn PDF document text
    • https://mujilaku.weebly.com/uploads/1/3/4/3/134389228/7345354.pdfIn PDF document text
    • https://cdn.sqhk.co/wukatigubo/jdhetru/stirmas_online_shopping_made_fun_review.pdfIn PDF document text
    • https://cdn.sqhk.co/livefivepa/hwiiThh/bingo_games_online_to_win_money.pdfIn PDF document text
    • https://mizugoveram.weebly.com/uploads/1/3/3/9/133986338/4485454.pdfIn PDF document text
    • https://zixozuji.weebly.com/uploads/1/3/1/4/131454221/8bd46.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_1e970ede6961404081205c41dd47adf6.pdf?index=trueIn PDF document text
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_d78cca0a63704d55acb82bc6f7040ee7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3525498-1e05-40eb-b8dd-b9befc3fa0a8/vifisow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a84bcdf7-6782-423c-b92e-b88f3a9ed774/what_is_simple_compound_and_complex_sentences_exercise.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_afcbae14ba3f43aaaa00057ee0f56354.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/36c43d4c-4f10-4dab-bc5a-dc96609de329/how_would_you_describe_moonshine.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/introduction_to_computer_science_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1d4d069-bed9-4d7a-8d14-beae47b5efa8/how_to_connect_vizio_soundbar_to_speakers.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/66341951562.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/tesulisaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39f55609-17f1-49e1-8667-877c1e1d2acb/glacier_bay_faucet_sprayer_replacement.pdfIn PDF document text
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_4c162348943048828591162939ad9411.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tezude/85775215794.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_off0000ec7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7A 5192 bytes
SHA-256: e7163419f6bdf3f690618f449c53b7cc649a8a06345d2b023bafc03a63260ab3
font_01_sfnt_off0000fe4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4B 10380 bytes
SHA-256: 1f3c2001d3aa2195bd217242df89c2ee3cde2ab125f9831e5891769dc34e3375