Malicious PDF — malware analysis report

Static analysis result for SHA-256 4888317d350fa4f1…

MALICIOUS

PDF

83.4 KB Created: 2020-12-30 02:15:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9f0af07270ba6444961d625e803f5f18 SHA-1: b02ac7961dc0e58df1e63f0d8d5822b77f6d8686 SHA-256: 4888317d350fa4f116d6c21b9b29c16cf580b33ccf668ea80c251f2d3ffec420
204 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF file was flagged by multiple heuristics as malicious, including a critical detection by ClamAV and ML classification. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document likely instructs the user to paste content into a shell, a common technique for executing malicious commands. The presence of numerous external links, including one to 'traffine.ru', suggests a potential phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://traffine.ru/strik?utm_term=retro+warmth+lookbook PDF link annotation
    • https://kolivobaka.weebly.com/uploads/1/3/4/5/134500933/xujakobesuridirepexa.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/706638.pdfIn PDF document text
    • https://kimuremosov.weebly.com/uploads/1/3/4/7/134732255/rogetilota-rowuxavev-sonugexanumoj-melala.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f9252f1e6038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409238/normal_5fe75dbfcd373.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417216/normal_5fb371e9b440b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459922/normal_5fce981d24db5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452152/normal_5fd8687d5bbe9.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/putelekireza/letterhead_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f01a8d2d-f1d4-4d68-8402-33aabd38e219/fedulozubexelafozenu.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/gofaxofakutuzelizutujuda.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/58250927482.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/hatchery_mod_breeding_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/855e3353-a81e-4f32-986d-2722d4029a2b/vupekomuraze.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/the_client_by_john_grisham.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_off00010866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10866 5052 bytes
SHA-256: 0ceca4df71b1e1e0dab6d88443fd451577ded75e91c801e2214aca3c7878a555
font_01_sfnt_off0001197b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197B 11532 bytes
SHA-256: 63edc871631f01d3c9aef99401aa551c7e3ff637b9ac2042bc7bcdc7bc2846db

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