Malicious PDF — malware analysis report

Static analysis result for SHA-256 789a5598fa88cdc9…

MALICIOUS

PDF

65.2 KB Created: 2021-02-20 20:07:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 67c118757948ff82180a887de23ee7b9 SHA-1: 5f1fb984b8f86eb593f0161b78f08080ef76e3e6 SHA-256: 789a5598fa88cdc9e33baa9998dde761c29c1627d779ac0bc6bd07c0c0890b71
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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-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.
  • 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://seumenha.ru/wix?keyword=card+wars+kingdom+cheats+unlimited+gems PDF link annotation
    • http://nebo-baikala.ru/the_pilgrims_progress_scott_cawthon_downloadvja8e.pdfIn PDF document text
    • http://look-hotel.com/mifaforef3kp2t.pdfIn PDF document text
    • http://stebsmeh.space/android_watch_phonedmlf4.pdfIn PDF document text
    • http://nerroba.info/377100428814jmm9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467027/normal_5fd639927caa3.pdfIn PDF document text
    • http://usersonlineguardingsettings.site/laparazudovibodadubuqns7.pdfIn PDF document text
    • http://gaydating.world/sajozikeragefivitq8xqy.pdfIn PDF document text
    • http://robolab.one/gerogsc524.pdfIn PDF document text
    • http://leoidet.xyz/free_printable_blank_bingo_cards_templatejv53s.pdfIn PDF document text
    • https://dikajumexuw.weebly.com/uploads/1/3/4/3/134324924/rawogagur.pdfIn PDF document text
    • https://manabuvajej.weebly.com/uploads/1/3/4/8/134847277/2978874.pdfIn PDF document text
    • https://lipazugarajoko.weebly.com/uploads/1/3/5/3/135318447/furuxilo.pdfIn PDF document text
    • https://kadamoxezegawuf.weebly.com/uploads/1/3/4/3/134347408/5793673.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/jotizifime/48237289530.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/mubexunatilupupajelo.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/10051947870.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/befibekadufowufavesalone.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/43525868775.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_off0000c246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC246 5416 bytes
SHA-256: e48e93a137c8965ec87e2485105309aa29c98949a06e3b2eb7c344a750e7e75f
font_01_sfnt_off0000d49c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49C 10260 bytes
SHA-256: d78422a880419f3e34063a170856a75cab470d1db1db630dcf4399dee8a188ac

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