Malicious PDF — malware analysis report

Static analysis result for SHA-256 c16a1b847ea83245…

MALICIOUS

PDF

82.7 KB Created: 2021-01-19 16:34:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e6e6b822aa18d947284a7c438f25b595 SHA-1: 4b3b4d7f2705bc830fb714416c959fd0fffb4fdd SHA-256: c16a1b847ea83245ca887c3af939595a55836c36fdda7554f225c594a5315c6e
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 0.9997

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://bologen.ru/aws?utm_term=music+sheets+free+blank PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456391/normal_5fa51499281fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455405/normal_5fc351b31ee5c.pdfIn PDF document text
    • https://cdn.sqhk.co/lezebulodiw/jahdjao/64177351971.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_5fa005a7e3d7b.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/jinitorip-bolag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473938/normal_5fd07924be71c.pdfIn PDF document text
    • https://gunobapeve.weebly.com/uploads/1/3/4/7/134706327/sowakumujumefixe.pdfIn PDF document text
    • https://cdn.sqhk.co/jawafurovif/Gjjieig/taza_grille_middle_eastern_restaurant.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475582/normal_5ff0d5a8d8229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393790/normal_5fa21d0126ce2.pdfIn PDF document text
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/8845025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443624/normal_5fa0e6f563ec1.pdfIn PDF document text
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/6885788.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/piradi/63585796571.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/gusafut.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/caracteristicas_de_bacillus_subtilis.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/74359693095.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/45747379516.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/does_apple_music_for_android_have_airplay.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/division_problems_with_remainders_worksheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07E 5176 bytes
SHA-256: 03c6e46ec77eb407345d31090f550050307a3b02e6039ed45ae4864a5e66fdc0
font_01_sfnt_off0001022a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022A 11232 bytes
SHA-256: 8176d337da514e4757fdee6a7a5cb41a714a69c276a9c84994f05f6e434a9e35
font_02_sfnt_off00012883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12883 16100 bytes
SHA-256: d973db94ba2c448c661c26f08d051ac794e7cb4f3c7daa33c2141e8036f071b6

Open this report in the interactive analyzer, or submit your own file for analysis.