Malicious PDF — malware analysis report

Static analysis result for SHA-256 655b361598473cae…

MALICIOUS

PDF

66.7 KB Created: 2021-04-06 21:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ee6a6ec030b74a29e9dcee5fdda13d95 SHA-1: 5fdffee526e183bccd1d7b721259c33cb2038c4a SHA-256: 655b361598473cae3d09099735a4ed9a8dd4a062c7b6ee0f2b38566901cae652
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=texas+instrument+ti+30x+iis+factorial+button PDF link annotation
    • https://wexetapita.weebly.com/uploads/1/3/4/3/134307875/ledazewewelejabibeg.pdfIn PDF document text
    • https://zomimodobi.weebly.com/uploads/1/3/0/7/130739583/5892144.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/if2ijjc/american_drag_racing_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462775/normal_5ff9b10663298.pdfIn PDF document text
    • http://fagogit.sportsontheweb.net/vabubogojebatagarijezip.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/ubGibsz/mebedewamujazefo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498994/normal_606b77d1102cd.pdfIn PDF document text
    • https://cdn.sqhk.co/nadipozow/0cihVN8/video_tube_downloader_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454990/normal_5ff0702c5629d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421460/normal_5fc853809a118.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/ziwanifow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://62bfe9e3-d01a-456c-9d14-3ac71290fd99.filesusr.com/ugd/cfe640_d469accbd5bc4cc69f0050b6476d3b0a.pdf?index=trueIn PDF document text
    • http://vidilig.onlinewebshop.net/60827447864.pdfIn PDF document text
    • https://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_8221ec0b59f1425c97ee3c7f9aa8e295.pdf?index=trueIn PDF document text
    • https://db38eef3-7d65-43a4-badd-ba39ed7d9417.filesusr.com/ugd/bd2483_071820f66db9488a8c28d7c1a4507645.pdf?index=trueIn PDF document text
    • https://cc0b58a5-7bf4-4b41-9cd7-d9bc0cd2cc6f.filesusr.com/ugd/6dc98b_5ac99db21ae24df2b976fa8735957bd6.pdf?index=trueIn PDF document text
    • https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_835e5513d982450e81054c346d0706df.pdf?index=trueIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_abaa186e5bc847448e00b98ba5f4ace9.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC91D 5488 bytes
SHA-256: b52f59115d2c7ff96ab474643e95ee7c71d2b4de3b93d7c7b34f2ecd01c97f59
font_01_sfnt_off0000dbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAD 9920 bytes
SHA-256: a28c72a720618eb87e4affb065c829514a728c696e5dc710d375e78322b4a937

Open this report in the interactive analyzer, or submit your own file for analysis.