Malicious PDF — malware analysis report

Static analysis result for SHA-256 78456f3a4c6fd6a4…

MALICIOUS

PDF

71.5 KB Created: 2021-03-13 17:27:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d5a87024c3bce744c594cbf4f15b9781 SHA-1: 52b7e688776af25070a563b4abbe6d939aee676f SHA-256: 78456f3a4c6fd6a4320f03d777000a7033588979590e25f5c20be0f536e7bcff
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 0.9995

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://jumiwimov.ru/123?utm_term=seiko+alarm+chronograph+digital+watch+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456712/normal_5fccdffed6fab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427821/normal_5fe419dbc3313.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409248/normal_5fe4c4553eebf.pdfIn PDF document text
    • https://pobanuritixejun.weebly.com/uploads/1/3/4/6/134601578/4702925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453889/normal_60415e74f16b9.pdfIn PDF document text
    • https://fajorisovobune.weebly.com/uploads/1/3/4/7/134752278/bosepelafoluro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411219/normal_603742f90b60a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488569/normal_5fda649b9d8e2.pdfIn PDF document text
    • https://nejaxadutoxukax.weebly.com/uploads/1/3/4/6/134622523/banebo-mosinorekaz-kewune-wovipovinudar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416919/normal_60035d9b962a9.pdfIn PDF document text
    • https://kekixulup.weebly.com/uploads/1/3/1/4/131407102/ripegodiko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481406/normal_600b148d5d9ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375209/normal_5ff9b36879f96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391024/normal_6004ed1bd2e88.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://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_e0e21953a4fb4ac8b1836e2bb0857070.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/bajuxinagiwinojiz.pdfIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_df4dc8b375c24f119f4f07dbbe407cd1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mejobu/acer_travelmate_p243_webcam_driver.pdfIn PDF document text
    • https://484a0fbd-04e0-416f-b335-41eb3f66808b.filesusr.com/ugd/228afb_1ef77941be9c46c1ab46d98b6cecdd73.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/disuwepixofaxirogojik.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/89273025989.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/36605001834.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD8 5452 bytes
SHA-256: bb63b2f7453d4fec264abe500599f8104cceff3d6602264add2d0e7f4788f5ac
font_01_sfnt_off0000e03b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03B 9908 bytes
SHA-256: a992feb4d6ffea6e49aa6a66dfc1de17ce71c06c2ae0f6fcb6f53f35829b96bb
font_02_sfnt_off00010221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10221 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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