Malicious PDF — malware analysis report

Static analysis result for SHA-256 68935c4f8ffeab4e…

MALICIOUS

PDF

68.4 KB Created: 2020-11-10 12:10:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ab7b2647cd1a2ab6cd39af7bdedbffd2 SHA-1: 35aa8f2e95d0edda2b03acf7cbfd86cc90ebc878 SHA-256: 68935c4f8ffeab4ed09f11bce3b2bb9472960186cbea4ed5cf6e1536e6bc70c5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many of which are generated in a link farm pattern, suggesting a phishing or SEO poisoning attempt. One prominent URL, 'https://traffnew.ru/aws?keyword=zynga+poker+app+download+pc', indicates a lure for software downloads. The ClamAV detection and ML classifier strongly indicate malicious content, likely a phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffnew.ru/aws?keyword=zynga+poker+app+download+pc PDF link annotation
    • https://selubigal.weebly.com/uploads/1/3/4/5/134518702/315733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424645/normal_5f974e16af7e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416504/normal_5fa4282738335.pdfIn PDF document text
    • https://weratirotiset.weebly.com/uploads/1/3/4/3/134322017/kejaxofetiwav.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/1940959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f8ff6e832623.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/pizexopenaxu/lyman_50th_reloading_manual_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/44827625781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bbcb10d-84f0-40bd-9dec-9374872d62db/periodic_trends_test_review_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/cleric_spellcasting_ability_modifier.pdfIn PDF document text
    • https://s3.amazonaws.com/bodepova/biome_finder_for_bedrock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8b01558-c6a7-47f8-8e6d-cb9b06445348/elongaciC3B3n_y_desaturaciC3B3n_de_los_C3A1cidos_grasos.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/4525094105.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_off0000cd9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9C 5280 bytes
SHA-256: a22197036b27d1782bfde02bc8c902d48a7a4afe113246eb7f63f9276f72c3ad
font_01_sfnt_off0000dfc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC6 10864 bytes
SHA-256: 8fff4dcef027a40173d0f0a9fb7661d449696878ad1556c80ad56df81b1a85b5

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