Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba873e0d2e4814bd…

MALICIOUS

PDF

73.4 KB Created: 2020-11-20 20:58:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 0f102b4126b78096a2276a1e9cd940d7 SHA-1: 52caac8371eef3923c443641ea3180cb9e41d6f8 SHA-256: ba873e0d2e4814bdf562b597452b8fac45c4de0483b5e53cccd866d91edc971f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a significant number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary external URL, 'https://traffnew.ru/123?utm_term=best+fiends+forever+mod+apk+2019', is suspicious and likely leads to a malicious site. ClamAV detection and ML classification further confirm its malicious nature, suggesting it's a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffnew.ru/123?utm_term=best+fiends+forever+mod+apk+2019 PDF link annotation
    • https://rojisubul.weebly.com/uploads/1/3/4/5/134593633/rajul-tiziwemuxazebar-nirudupi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421051/normal_5fb62b8c87de3.pdfIn PDF document text
    • https://sakifawabepufa.weebly.com/uploads/1/3/4/4/134466371/5077117.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/jezobasit/jizusubudivabam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87dce76d-f08e-419d-a40d-c2146b5131c5/flying_pig_lab_physics_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/221c6799-cc15-4ed4-b067-49345b32aa62/magical_balloon_overlays_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c547351-3302-4ec2-9e7d-9deeb65619f8/aa_fears_list_example.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/nowimisuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/165e2565-092a-4b9d-bf28-33f834156acc/20050965449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a72b0c4-6990-47eb-9e95-5aa3da635c32/bujumuzijaxosatezuja.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/69844254294.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/distant_worlds_universe_beginner_s_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9598c25-f610-4716-a07f-93ee9e3aa436/the_story_of_an_hour_by_kate_chopin.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/lucky_draw_template_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/87815499326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0677075c-ae91-464b-8a06-223d8b1ef813/canon_imageclass_lbp151dw.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_off0000d550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD550 5808 bytes
SHA-256: 57d6e42ee4923759a4a6d11e8a718bfb4111a3090f2f2dae15a27a5c360eec47
font_01_sfnt_off0000e910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE910 14356 bytes
SHA-256: 8c2a053a5a58c79700b3025a2f6a6125dcc239bdfc39f9ed97d79ffb60e97a82

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