Malicious PDF — malware analysis report

Static analysis result for SHA-256 74837165f0c86a08…

MALICIOUS

PDF

80.0 KB Created: 2021-03-23 19:08:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 34ebc23816e01e6579114caa2e014753 SHA-1: 123ce1c6b649f689e2b3179e17a34e2e19bb7ff2 SHA-256: 74837165f0c86a081085751d3e97bc369d6f2d1feb3add73ff260bb6b4b07b3b
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://soxebez.ru/123?utm_term=transunion+credit+report+dispute+form PDF link annotation
    • http://inmyshtangen.xyz/minn_kota_powerdrive_70_w_i-pilot__bluetooth_70_lbs._thrust_54_shaftedzgo.pdfIn PDF document text
    • http://telgrm.site/mapunilokugobakuwagebonapl0cs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467298/normal_5fea4629db6b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491673/normal_603b77b832862.pdfIn PDF document text
    • http://jepewadagamer.scienceontheweb.net/27216429013.pdfIn PDF document text
    • http://xiruzox.mygamesonline.org/humminbird_helix_5_di_fish_finder_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417140/normal_5fc73ae046fd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483604/normal_602a29e8c3da5.pdfIn PDF document text
    • http://zekifafeter.scienceontheweb.net/ielts_simon_writing_task_2_free_download.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://s3.amazonaws.com/rujabepifar/kupumexizaxibef.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/astm_a588.pdfIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_2ca76b421df3424ea2dcb53563748c65.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/49914670299.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/95824941860.pdfIn PDF document text
    • http://xifeloj.onlinewebshop.net/nike_brand_standards.pdfIn PDF document text
    • https://50b44c92-959e-4a15-bf83-93d6b2b518d6.filesusr.com/ugd/3ed44c_02e0cef5108941899135b45bc2e24275.pdf?index=trueIn PDF document text
    • http://nekelaxowe.atwebpages.com/atlas_of_benthic_foraminifera.pdfIn PDF document text
    • http://zogosugo.onlinewebshop.net/lunekawisofuxixamaxafari.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/31121209644.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/muxituximedenomegowoke.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00A 5100 bytes
SHA-256: eeea37fbab0a677b60df5096e3042cccd76bd3d95de074dd016b74c534c2b0a1
font_01_sfnt_off0001013e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013E 10392 bytes
SHA-256: 01d0cf15dd220283f28c7fc321cd5ec213ea2988a4298c24fb28d1bcfccf8a7b
font_02_sfnt_off00012491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12491 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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