Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee53edab76b68b5…

MALICIOUS

PDF

75.1 KB Created: 2021-03-03 15:55:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bc0fc1c35f7bd134eb1abcf6e00111ff SHA-1: 906c8de39fd8d6e6beaeec9ae959415fea570cbf SHA-256: fee53edab76b68b504b03236a2d9eb3bfa2e2c300d172b857ff1d909886d7914
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://zajinet.ru/strik?utm_term=exilim+casio+camera+cost PDF link annotation
    • http://zakomuxoza.getenjoyment.net/zevepetavikegupak.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/Kje3A78/qr_barcode_scanner_app_for_android.pdfIn PDF document text
    • https://bemebedutor.weebly.com/uploads/1/3/4/6/134624352/murazo-rujonawemomeg-jokepotulafuv-babavuxiroter.pdfIn PDF document text
    • https://panulozeti.weebly.com/uploads/1/3/5/3/135351273/voditadu_gagudire.pdfIn PDF document text
    • https://linebabeta.weebly.com/uploads/1/3/5/3/135317009/9379880.pdfIn PDF document text
    • http://nakalabaxis.mywebcommunity.org/the_lies_of_locke_lamora_book_4_release_date.pdfIn PDF document text
    • https://vosaxivuminol.weebly.com/uploads/1/3/4/3/134387598/1823799.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/sazomo/nomenclatura_para_alcanos.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/metegepatavatitigadinomi.pdfIn PDF document text
    • http://xutagefev.epizy.com/r_programming_bangla_book.pdfIn PDF document text
    • http://tagijonegularol.myartsonline.com/fujitsu_fi-7160_wia_driver_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/hydatidiform_mole_vs_blighted_ovum.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/past_simple_exercise_regular_verbs.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/99106957280.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_off0000ec64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC64 4968 bytes
SHA-256: 87458a3422fed1f9cc6f9899bf1a27a6f357e4b30732e15ce44c13185b358697
font_01_sfnt_off0000fd3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3A 10184 bytes
SHA-256: fe7f83651ef375f7813d6e4c398db3ef9e91b603fce81bd00ae9eaf672717fc8

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