Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa1e85563cb397e…

MALICIOUS

PDF

76.6 KB Created: 2021-01-06 09:08:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 33b9a2988ce14a5d64999ff41e456b18 SHA-1: 96656cec5c7df0b7cad6e3c70f767d802bbe4479 SHA-256: 2fa1e85563cb397ef3b82cbe8cc0255043fee7a8ec367bb97c4d7a4b7202b452
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links, identified as a link farm, directing users to various websites. One of the primary links, 'https://gettraff.ru/aws?utm_term=galvin+green+waterproof+size+guide', is flagged as a malicious redirector. The ClamAV detection and ML classifier further support the malicious nature of this document, indicating it's likely used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/aws?utm_term=galvin+green+waterproof+size+guide In PDF document text
    • https://fepaxumezo.weebly.com/uploads/1/3/4/3/134320712/vobevumezaluso_lomuvowiziz.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/hfgdijO/80_s_rock_hits_top_100.pdfIn PDF document text
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/mabibaro.pdfIn PDF document text
    • https://zuziraluxir.weebly.com/uploads/1/3/4/8/134899121/3e48e83e4b10a44.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/Skqqpie/sago_mini_toolbox_apk_full.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/wisuw/interview_skills_and_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b26aa02-3bb1-4d61-a081-eb73042669d5/78010855976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98ff441b-4a02-435d-98e9-d6387ae141c2/medieval_cop_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/220c8a3f-2497-4e7e-a9ee-89cbe777885d/84667921230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/109022e9-54fa-4bfc-9e3d-1b7658c8d760/elemental_word_search_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5f5275a-066f-4655-9fe6-b50571d42927/jojegazaj.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA65 5440 bytes
SHA-256: fa34a35dd1e929d77ca1bd0682e1185e7d444582a96c2d5e37bf3da795354fa9
font_01_sfnt_off0000dd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD14 1956 bytes
SHA-256: 6a43e0e20400f676566478070f5619988c78d378466876bc277c717517510a6d
font_02_sfnt_off0000e67b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67B 12048 bytes
SHA-256: a98dfa211fd7390b6d7e18f017d9b0bd08d9eb5f9e1ba6319c0a6cc685973113
font_03_sfnt_off00010f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F18 16036 bytes
SHA-256: 149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1

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