Malicious PDF — malware analysis report

Static analysis result for SHA-256 9adf48f97b5c0452…

MALICIOUS

PDF

86.3 KB Created: 2021-03-10 09:01:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7b4677f77a3e8751ddd57693c1cbbd82 SHA-1: dcd697f80e7bb20fcbcd465f60b1436a92aadc50 SHA-256: 9adf48f97b5c045226f43015329b7e8c60374cb1967a754d60459d7d46604196
186 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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/award?keyword=3+states+of+matter+worksheet+pdf PDF link annotation
    • https://lavolobaned.weebly.com/uploads/1/3/0/7/130740571/gedesokonov_fufasowow_raledu_sefavemem.pdfIn PDF document text
    • http://bestsalestoday.xyz/viduborutuboviuwc9u.pdfIn PDF document text
    • https://fegenogo.weebly.com/uploads/1/3/5/9/135981842/71b142c06bfe5.pdfIn PDF document text
    • https://mifadugusukar.weebly.com/uploads/1/3/5/3/135337027/f7308f1768addc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410462/normal_60279c6d01859.pdfIn PDF document text
    • https://gafonubizaragu.weebly.com/uploads/1/3/5/3/135346264/loxuzifawomuw-tabuledaviwedit-buwaxu.pdfIn PDF document text
    • https://pesuzipowezav.weebly.com/uploads/1/3/1/6/131636843/3094808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_6018bded35291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455185/normal_5fd9797a449ac.pdfIn PDF document text
    • http://bometaximom.scienceontheweb.net/6999974328.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/harman_pellet_stove_battery_backup_512h.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/e187baabc86a8.pdfIn PDF document text
    • http://ejqy.com/circle_of_life_sheet_music3e2cq.pdfIn PDF document text
    • https://notetezowinebax.weebly.com/uploads/1/3/6/0/136019470/getetegum.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://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_09cd46753ca14c1a80a42ac1d0b96ee2.pdf?index=trueIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_09a65dae0b1743b791b50f4963da65c3.pdf?index=trueIn PDF document text
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_f3ccb32044514d39adaec3026bdb3bac.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10852 5108 bytes
SHA-256: 66c351abac6911896db0cc56dc2a81a9fb6a277ec9fa7d9ee762495f3ef66862
font_01_sfnt_off000119b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B5 10492 bytes
SHA-256: 48a482b42965f579d189b30e1bf875099cbda0e91a052df97189e507622bc386
font_02_sfnt_off00013dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DBF 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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