Malicious PDF — malware analysis report

Static analysis result for SHA-256 1058a592945ceb1f…

MALICIOUS

PDF

81.9 KB Created: 2021-03-03 02:13:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8582979e20d8d8be8b8b2aca464c8974 SHA-1: 8ad17a9af329e35bca17ca85bbc166f9be05f4ee SHA-256: 1058a592945ceb1fb025475cc34442dde262add8368f954186fe5c1ca1a81573
176 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. It uses a callback-phone (TOAD) lure. 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 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://xajibur.ru/123?utm_term=motorola+xts+2500+battery+charger PDF link annotation
    • http://zugemenelil.medianewsonline.com/men_without_women_summary.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/11077463470.pdfIn PDF document text
    • https://dibigisilob.weebly.com/uploads/1/3/1/6/131607467/mutifixilom.pdfIn PDF document text
    • http://powuvomewekuxeb.getenjoyment.net/39443335940.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/what_is_a_centrally_planned_economy_definition.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/jujadodedaruxix/kevenagufuzusewafibu.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/bawafofanezoguvawikiki.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/73256296731.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/51970799166.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/binary_option_auto_trading_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/model_3_price_reduction_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/409030387.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/wibun.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/wefatuwogexazimanob.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/96053075587.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/2018_best_sci_fi_adventure_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/rewrite_these_reported_questions_in_direct_speech.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/achievement_test_examples.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10250 5772 bytes
SHA-256: 4eb21bbe606a23b81043e01f23c3a5d465417c3e0d6d4a317fe3b23901d264a2
font_01_sfnt_off0001160a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160A 10656 bytes
SHA-256: a36a19288031859657f102459ba95a4a37c751ce88357b27ad4cfd61504a5824

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