Malicious PDF — malware analysis report

Static analysis result for SHA-256 785911c7f6abadc7…

MALICIOUS

PDF

68.9 KB Created: 2020-11-30 21:02:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ab73f59b5c5f88e0b95c2b182dd59811 SHA-1: d1e699d437533fe569da38d01f68cae70d590195 SHA-256: 785911c7f6abadc7095ab78f7c46cd67195f2b35e57341c5e500db6e15c2ace4
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://ggtraff.ru/strik?utm_term=mary+jane+platform+pumps+blue In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_5f97f91435faf.pdfIn PDF document text
    • https://boburebapexew.weebly.com/uploads/1/3/4/5/134597485/gidamedamowif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373788/normal_5f8b759ad3266.pdfIn PDF document text
    • https://murikupa.weebly.com/uploads/1/3/4/4/134481598/nawevukafetizeb-kixuxoge.pdfIn 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/faa0bdff-6d61-4edc-b2ec-21bb84fc1d5e/bivedazelazema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e8ba3d-e4ba-42a1-a42a-edeba0884134/used_goose_decoy.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/4404376876.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28402be9b69395115071f/t/5fc520383c02f22b9db0226d/1606754360395/47508153394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4af66f21-c9b5-48cb-a5c4-82c8b2845865/jelirunafin.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c57e8787e879896b5618/t/5fc1541608845d0924bc0414/1606505495784/15778884870.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dda511f6a41984857aa8/t/5fc372381972c46e3c0a3348/1606644280796/793298275.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/marcus_aurelius_meditations_book_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/646db567-91a0-4769-bf8e-440457f9c736/gukuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd441a9-c9cf-46f5-b92d-20f5dd210b6b/tabojubemarep.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC027 5204 bytes
SHA-256: c35fcf6437d4df36171af4c26d40479c0f8cc33bfce78a940b87a0cceb36c4c4
font_01_sfnt_off0000d1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D3 11088 bytes
SHA-256: c47b0bda121c75a79103ab9f60f5578b6a68eebbe55f4bf90aeb811901339324
font_02_sfnt_off0000f716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF716 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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