Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2ca676385029ab…

MALICIOUS

PDF

104.7 KB Created: 2020-12-18 09:46:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ceef3287331404494e42c7aba3128ac6 SHA-1: 11b77160c1ead42c75818a6414c0145f1e3a9b48 SHA-256: 9a2ca676385029abdee6fc7ba4ad6ae4645b8eaff572c5c8712330b4a2d6277e
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/123?utm_term=1000+watt+amp+subwoofer In PDF document text
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/258367.pdfIn PDF document text
    • https://mewifukemi.weebly.com/uploads/1/3/4/7/134764424/1ccd6.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/cce745ba-a0bc-407a-bb17-16ab878a8199/5716239606.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfa2a9b1ed03538a05a29/1606285866858/haier_hpf12xcm-lb_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd037c72f8b574a0f44599/1606222717031/95765303027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a840ebb-1aaa-490f-8d9b-a9c52114da65/88389837074.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37ae224b06a7eb30faf9f/t/5fcd86236f0099009e7bdc32/1607304740774/alchemy_definition_oxford_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b11a19-362f-4e02-9630-9f46538041f1/white_teeth_full_text.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf600a1972c46e3c96622f/1606377485705/1888255329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45fe7dab-0713-4084-9d54-49191c0cfbe5/dragon_ball_fighting_games_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdd17ab7-4176-4fd2-ba25-7b0d128dbff9/toee_vest_of_escape.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d066bf71053ccb31607e/t/5fc625eb61e25426e109b892/1606821357423/kakejawowotuwanonuxote.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f24c403f5353fd95fd42/t/5fc2b11df3de5e49b5bcb351/1606594847784/52834298793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/897edf9f-e0ea-43a5-af43-5eacf59215c6/muwexitesufenujanolafi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc56f218787e879898a6561/t/5fd63966164d0f203c758a59/1607874918782/6877717184.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14635 5344 bytes
SHA-256: 2f3e16da1beba49302389b5322cc7a2478713db6b9c08e5173692c8f1483e6cc
font_01_sfnt_off0001585b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1585B 11380 bytes
SHA-256: d24bd0cae11bebb2d16456bd8a22ac952a5d0209cb883a1c55ce7c2f573c58fa
font_02_sfnt_off00017ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EA5 16180 bytes
SHA-256: 11e90d52e06cd81369f8201d71d0fd39aa49fa9f5c7a1d8f102e4d40d53c3161

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