Malicious PDF — malware analysis report

Static analysis result for SHA-256 2890ab2c71f2e91e…

MALICIOUS

PDF

72.7 KB Created: 2020-11-10 19:02:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4d3b4504d00160c671f0101c1301e6d6 SHA-1: 9bdf415974df63d0bf525c3e17f9778154586acf SHA-256: 2890ab2c71f2e91e0bf32ffbf009a51746f623f2cb993f40c41b5ba2eece1987
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://trafficel.ru/aws?keyword=abhorred+definition+bible PDF link annotation
    • https://nuzibekupin.weebly.com/uploads/1/3/4/3/134338080/gufomejosipol.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/fubisi.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/gedesisumi/salemepirid.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/choosing_the_right_word_unit_11_level_f.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/romoridejefexovixajav.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/kubibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61ab8ffe-8ae8-47cc-931d-3b9aadc43a29/59513996636.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/javuzamekutira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f650a6d-b63e-436d-b9d2-f68f88faf2cd/badlion_client_cape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/882831ae-4e8c-4501-8394-fa3f5e130024/african_shower_curtains_for_bathroom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d6f1326-2320-4de1-b34e-da5e620b5c70/mefodonexinavopaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae3acad2-773b-483b-8670-fb2c66f2558a/19791495172.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81e59862-ce5d-4b39-b173-918e46e2eafa/george_w_carey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89f44269-5321-4dff-b7fe-d2b86c7d07b8/10210710419.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/wezebilitewalolo.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/ffxiv_squadron_battle_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/608d5053-ba7d-4bfc-9272-8d97a53859cb/dovenimusupakipori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae8acfc2-6341-4d0b-badb-2a91fa1d9abb/motor_for_samsung_dv45h7000ew_a2_dryer.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_off0000e141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE141 4736 bytes
SHA-256: 4b5d1e3f115e4881f4d944aeef2412420383c4076cbe2f76ac584cb1c20520f0
font_01_sfnt_off0000f150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF150 10688 bytes
SHA-256: d20137a6673753d9a3fc72d978c9db630afbbeb9b06c961cc4f6b922836762ad

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