Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1b915891401388e…

MALICIOUS

PDF

96.9 KB Created: 2020-11-24 06:38:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: aeac1dcfd38476a82749ca94d0fb40d6 SHA-1: d23ad702c401eb45bedba816625676671b621c0c SHA-256: d1b915891401388e1afe0c8e8ad1ab7d80c6a286d6d3a903eb3ba12f6bffd278
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/aws?utm_term=acrobat+pdf+editor+pro PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409110/normal_5fb7fe9aaeccb.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/zamimasadid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368478/normal_5f8a246fb9155.pdfIn PDF document text
    • https://geredape.weebly.com/uploads/1/3/4/3/134349068/janelarepikoma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426071/normal_5fb7e82db8685.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375358/normal_5f9ed1e9d7d8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374021/normal_5fb549cbc3203.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379048/normal_5fa12c918f324.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5f8b90347526f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389104/normal_5f8f45e2613aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367625/normal_5fa4e4888586c.pdfIn PDF document text
    • http://www.opentle.orgIn 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/a2d58135-8703-473b-9253-f80801fb3d0d/minecraft_windows_10_edition_hacked_client_download_1.16.1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63b6b7a5-351f-4a3f-89f2-726eb1a31f4b/52860480012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a72faaaf-e3db-4dbd-8db6-da2ac91263ff/ginapani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a14689e8-cbc8-4616-8194-235ffab41d8f/rowikakizinoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a75367-9491-4898-b51b-c5342e164b3d/bajivuridisejeloge.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

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
stream_004_off00012032.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12032 16196 bytes
SHA-256: 8b779ed1c0e3835cf93d58dfac8b2e0700fa40f4324700c5b04bff5ddca54690
font_00_sfnt_off00010eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EED 5068 bytes
SHA-256: b0a2b1c296e490e312964dd5308db5a870964a8b85252779b8d7031fc1f513e1
font_02_sfnt_off00014c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C6B 13512 bytes
SHA-256: 36abcb11cb747243e46844bc3e70dae31a313be6b4945c69bd859fd17d59887d

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