Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab630bad7b1ee097…

MALICIOUS

PDF

68.5 KB Created: 2021-01-02 00:27:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b8ebd9d24734ab3ae4f35f2c07936273 SHA-1: 22c4b94626a8d10988505b04748f12132b38811d SHA-256: ab630bad7b1ee09704f18e68faf64198f76d8eb43a173cb879029ad1cf56e44e
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The heuristic firings indicate a link farm and a critical ClamAV detection for 'Pdf.Phishing.Trojan'. This suggests the document is designed to lead users to malicious infrastructure, likely for phishing or to download further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=nutrition+for+life+science+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390330/normal_5f8f59bbcc317.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484990/normal_5fae78fe052e0.pdfIn PDF document text
    • https://cdn.sqhk.co/fexejikexew/hAicHia/septic_tanks_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/sekeniti/JkhaUnE/authorised_push_payment_fraud_compensation.pdfIn PDF document text
    • https://mobojifukan.weebly.com/uploads/1/3/4/6/134688158/240a3294.pdfIn PDF document text
    • https://cdn.sqhk.co/mozesefoso/jggfMii/aliens_drive_me_crazy_download_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pavetikedur/hjgdwpH/talking_tom_and_friends_characters_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzijaxab/K2UmKii/superhero_flying_helicopter_stunt_racing_games_pc.pdfIn PDF document text
    • https://sojoxatufuwi.weebly.com/uploads/1/3/4/7/134710771/aea42b42c38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470014/normal_5fc9cfa36ebbb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4570ae3b-2fcf-4eef-8ec2-b83ba8d8b12e/68119386557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e52f1757-771c-4084-9bf2-560714ee27d8/jexukuwogopisofuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6dcc5c6-c0a8-48c3-8469-e01891e03f44/the_lightning_thief_movie_full_movie.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_off0000d1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F4 4908 bytes
SHA-256: 93afdfcb7c1c6cedc69e990ecae79f79731501123518d2ddafb99a4f44a862aa
font_01_sfnt_off0000e2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C0 10136 bytes
SHA-256: 0630e70b91de10d0693c93a8f27d5abc90c6e3e1fd553804605df7c1fe1445a9

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