Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1d1acd1accd8942…

MALICIOUS

PDF

110.8 KB Created: 2021-06-10 13:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 43304884cf8d06fb571e18faf9cdb3e7 SHA-1: 569ad44152e6f74b5545b74504630f95cb59f0e2 SHA-256: a1d1acd1accd89421fd191329998c05ba5b7f8921cf5edb62013379a5b01c1f4
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 0.9998

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
  • 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://queure.ru/pbw?utm_term=ikemen+sengoku+oda PDF link annotation
    • https://zufuzizulilok.weebly.com/uploads/1/3/4/7/134702460/sajasoliw-wimovovofale-javufo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419204/normal_60024d40be99e.pdfIn PDF document text
    • https://tagipuzato.weebly.com/uploads/1/3/0/7/130776724/sonet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374021/normal_604ee7c1d23d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477401/normal_60c08d0410444.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475204/normal_5fffbef6c5b2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388406/normal_606a125fef226.pdfIn PDF document text
    • https://fovinekepug.weebly.com/uploads/1/3/4/5/134587719/gudodogiwekus-jorifoliwudij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371523/normal_5feff18698da8.pdfIn PDF document text
    • https://zimatesuti.weebly.com/uploads/1/3/0/8/130873828/gisepixajubaler.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/d84ee6e3-75c4-45b1-a61b-a6d55fb22093/fond_dcran_avengers_endgame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77f970cf-2fae-4d6b-b5b7-fe5120c361eb/farberware_rotisserie_prime_rib_cooking_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2aa3160-67a0-4c39-ac60-5e915cf730a6/99416980880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/240e46c0-8aeb-4f3a-8529-f9709b72709f/4419204147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da695f56-8a93-4402-9d40-053423b763bc/chogada_tara_mp3_320kbps_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e50b37a2-662c-46cb-b88a-6f994dfd0cc3/kotarod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18f8d8c2-eded-4855-937b-808f115528da/1308845732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5aa6f38-e97a-4dcf-b6a1-8f23ecf89d4f/87276556618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fa7a8e9-e303-47c9-9cad-13eb5e4a886b/norisisapetomuzigadevera.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17530 5020 bytes
SHA-256: 77e8c1cde9a0c595d0f538ba8a42ed697cd4b9db789ed5283262f2f8bd7850b0
font_01_sfnt_off00018638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18638 11920 bytes
SHA-256: 7921b141f0470398d2126abba5ea7d145c9a19cb31e7f7b5127ffc5ff112789b

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