Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c266cf5d36a49e…

MALICIOUS

PDF

79.0 KB Created: 2021-03-23 07:06:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 424ea82d93a3059bebcf879c1dc6c140 SHA-1: 5d1cfb970ebbc8e548ae7111a2365eb0a5ec85ad SHA-256: e9c266cf5d36a49e02b026633fd825ed7826be564a7ebbd89422bd265a8e5050
186 Risk Score

Malware Insights

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

This PDF file is classified as malicious and contains a significant number of external links, many of which point to disposable hosting. The document body text, though heavily obfuscated, includes a reference to 'international lawyer jobs nyc', suggesting a phishing or SEO link farm lure. The presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to malicious sites or to manipulate search engine rankings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=international+lawyer+jobs+nyc PDF link annotation
    • http://nakozek.mypressonline.com/sig_sauer_p229_holster_left_hand.pdfIn PDF document text
    • https://kuvomudoriri.weebly.com/uploads/1/3/1/4/131406544/pisusodefuzoxil.pdfIn PDF document text
    • https://wudizabilizone.weebly.com/uploads/1/3/4/7/134745746/2478339.pdfIn PDF document text
    • http://mixutadumekaje.mypressonline.com/vagabosanepudisipolawuvig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a39e0ad1-2d76-4c32-ab73-e7ef814d492b/31652017991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aba131df-2c3b-4ea8-8beb-90783a6f0937/7986697024.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/how_to_learn_python_for_beginners_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4afff1bc-fa0f-47ee-8217-93fe482108b8/rorirejawamuzoxodi.pdfIn PDF document text
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_a2f020284ac84f449137b4c01698007c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/65509410065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/976db125-4dc0-471f-95bf-64532107e954/is_si-f_polar_or_nonpolar.pdfIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_e59f07d6f88844b08491973a6f442bd9.pdf?index=trueIn PDF document text
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_832e11a6f9f74ec1ab546cc6326fdde5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/de481873-752d-44d3-9ce0-7b139cacae6b/93822546590.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/19853858782.pdfIn PDF document text
    • https://b724dda4-e2e0-47c5-811c-ae3b7273578b.filesusr.com/ugd/a1e5ee_801293e71a4f4ae6908410a05c781fe1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gusule/85263563735.pdfIn PDF document text
    • http://luregaw.onlinewebshop.net/gunoxivibofewedinaf.pdfIn PDF document text
    • https://0c17d2ad-06a2-4efd-9128-26148cac6670.filesusr.com/ugd/44320b_1da60dbeb746453bb5dca2208f3063ff.pdf?index=trueIn PDF document text
    • https://7980b0ff-2efe-48f4-a442-6c87bca80713.filesusr.com/ugd/9bd8c3_ee0775452be04291950dd9b06b59f20c.pdf?index=trueIn PDF document text
    • http://todiwefexoneb.atwebpages.com/capitale_du_monde_liste.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_off0000f831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF831 5140 bytes
SHA-256: 29d23736c86ff9a9d5fad3ab43904fba30059f4781fec91b69ab0f871bd1056c
font_01_sfnt_off000109d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D0 10752 bytes
SHA-256: 882ad63f86903b3e0e0e09f2aefe479bcc64b26fe5b480dc3dad85372a34bedf