Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c1df1dddf8fa86…

MALICIOUS

PDF

78.6 KB Created: 2020-11-28 22:36:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: dd31f0614d4e5c5177ccd4162121cd86 SHA-1: b11fe904d1eb1773743c8ffb8a23bcfca03e8010 SHA-256: 99c1df1dddf8fa86fcd236a7597daf9f57491100a5cb68e42b2a1ab5f6e306b5
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm, including a critical ClamAV detection for Pdf.Phishing.Trojan. The embedded URLs, particularly 'https://cctraff.ru/aws?utm_term=escape+plan+2013+free', are flagged as malicious redirectors. The presence of a 'download button' heuristic suggests a lure to trick users into clicking the malicious link, likely leading to a phishing page or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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
  • 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://cctraff.ru/aws?utm_term=escape+plan+2013+free In PDF document text
    • https://xigepeseforala.weebly.com/uploads/1/3/4/5/134508125/renivowojivufaw_pokolutujapuder_narujexudo_muberok.pdfIn PDF document text
    • https://fivilogavizizov.weebly.com/uploads/1/3/4/4/134446089/fileso_kixalodukuli_jakatekitizuto_kikabalupugatut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5f8f38b48f780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497346/normal_5fb5f5c990e17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388614/normal_5f99e9e61f4f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_5f9a8a7f1a83e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475989/normal_5fad2b1716424.pdfIn PDF document text
    • http://imzonlinIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5e8abe3a-3f4d-49f4-a6ca-28f1d3178f5f/16411292801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46ca4d35-b008-40e0-852f-2598be299487/karojagagusuwinelano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d31a4fc-3aea-462c-aeb8-f76987492a45/fabulae_graecae_translations_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d3ca632-8cc9-4849-90e7-c4eb25d8edd7/veridian_community_credit_union_routing_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dad1568-cf1b-4723-89d6-f127a58032ca/hoo_ha_hoo_tiki_tiki.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/95806933357.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/88058894506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d8ad7be-999e-46e5-8890-51b86ba9671f/36290103171.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE876 5008 bytes
SHA-256: 5455a35b1fe0c94a2b582494d2bbc40fe2b93805498c9767ba9c86bf10515797
font_01_sfnt_off0000f978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF978 11392 bytes
SHA-256: 3db0f096fc4d280680d745531fd9f6342bbb6b19f44451ea88863358083e86fd
font_02_sfnt_off00011fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAB 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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