Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ea7b9eed3b50e2…

MALICIOUS

PDF

106.2 KB Created: 2021-03-12 05:03:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7824368abe1d34a46707b66d791c2b31 SHA-1: 9205c72abffda628164d8131bdf0e26ba4e7cdc8 SHA-256: 22ea7b9eed3b50e2784f88473aca8d55070fe19481fd14cb9a60057b4262f261
164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=chiari+malformation+and+syringomyelia+in+dogs PDF link annotation
    • http://kikababono.mywebcommunity.org/which_cuisinart_waffle_maker_is_best.pdfIn PDF document text
    • http://piwulag.sportsontheweb.net/71001183069.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/83562604069.pdfIn PDF document text
    • https://jojonawizofobu.weebly.com/uploads/1/3/1/4/131438175/678652.pdfIn PDF document text
    • https://sovopedu.weebly.com/uploads/1/3/5/3/135301682/4961312.pdfIn PDF document text
    • https://lukidamovepuk.weebly.com/uploads/1/3/1/4/131437538/jaligivofi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_6da9a42734b4465ca95aca7f83d96b5d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e5a7e56-64ce-452d-b74c-5a503b52a374/xodaligirumafawi.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/74879397081.pdfIn PDF document text
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_5811a26681d84619b84511775645f4d3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/timex_expedition_watch_cell_price.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/binemabuxobazo.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/breaking_dawn_part_2_720p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37eb9d48-946b-4b13-8b64-a58476b82691/wevidisuxiwota.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/37127915075.pdfIn PDF document text
    • https://76a725e8-946c-4ae9-9249-cda469d35108.filesusr.com/ugd/83c8cc_a9d3718574364c05a26236090a6f9d5c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dotivaf/gmat_official_guide_online_free.pdfIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_efdf8d268ed44ba28e91aaf728c7bc8b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/51056731204.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/78173854102.pdfIn PDF document text
    • http://fadezanunadafik.myartsonline.com/wumebufenupu.pdfIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_6fe62eeec8ed4b528aa0f21437d708c6.pdf?index=trueIn 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CCF 5236 bytes
SHA-256: 490210a8c43aa488edf0689ce90d566bbe1f77f2b0d964ce7b364cabea80ea21
font_01_sfnt_off00014e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E7D 12256 bytes
SHA-256: 2cb4214314532ce42b9f873fb13a01c71c6ffab7b0be62b3797414b1f55d3c4c
font_02_sfnt_off000177a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177A5 16132 bytes
SHA-256: 4f6d6443d667672870c38ce4e1d364e29e61a0df6fd2d8217a47270b9fff04c9
font_03_sfnt_off00018c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C97 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378