Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7a2e9b7aeab002b…

MALICIOUS

PDF

78.2 KB Created: 2021-03-12 07:13:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b967f51cc620143fe1228fac9a5d8d7c SHA-1: 9d4c381ac11298c6ffb23e7b138bba817e563c5b SHA-256: f7a2e9b7aeab002b63074a1a780dc09c6254e21e12f5c7163a294ad09952aff8
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-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.
  • 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://lozipotod.ru/wix?keyword=proform+xp+trainer+580+treadmill+manual PDF link annotation
    • https://cdn.sqhk.co/kigaratak/lhi7giz/90751420100.pdfIn PDF document text
    • https://nuvitofoje.weebly.com/uploads/1/3/4/6/134640236/raroletolunogove.pdfIn PDF document text
    • https://cdn.sqhk.co/nikitabejup/4qmIghz/tanemep.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/HzjbSU3/sound_effects_app_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485001/normal_603b07e84d527.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/rerurapabufu_kodilegogido.pdfIn PDF document text
    • https://cdn.sqhk.co/wujozuzewed/fjciige/score_hero_hack_apk_iphone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494868/normal_5ffac5264039d.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/cjhgjJW/digobu.pdfIn PDF document text
    • https://bebedukiraf.weebly.com/uploads/1/3/4/8/134885496/6865464.pdfIn PDF document text
    • https://vokedovewugom.weebly.com/uploads/1/3/5/3/135349322/216219.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368481/normal_6031eda54eb64.pdfIn PDF document text
    • https://cdn.sqhk.co/tibatojo/mGtghhg/varuje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pakilapawunafep.epizy.com/songwriting_for_beginners_book.pdfIn PDF document text
    • http://woloripovopakop.rf.gd/murifaz.pdfIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_08b40032c41f4de6ad154f8aa9440125.pdf?index=trueIn PDF document text
    • https://8cff94d3-ecab-4ea5-ad27-d3e67d02fd32.filesusr.com/ugd/2813e2_14a2cba9b43a446eb8180452694b6987.pdf?index=trueIn PDF document text
    • https://dd39d194-9042-494f-90ab-223c96cf8da5.filesusr.com/ugd/5d3909_9b342935a5d1428991c73aac31455980.pdf?index=trueIn PDF document text
    • http://zutotakome.epizy.com/14134611561.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_off0000e616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE616 3724 bytes
SHA-256: 5f506f96885c68285abb08013964e969243e5a1cdb180af6bb27fe8127c8fd8a
font_01_sfnt_off0000f353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF353 5536 bytes
SHA-256: f80707e76602b2b248a305c1ad44e3dbd93382c09456a361a657cc3a4c6bf928
font_02_sfnt_off00010616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10616 10864 bytes
SHA-256: e70de979073b723d5662e2b11c942d7acb43864c598089c0943d527efbd2ad69

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