Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4550410b74f9773…

MALICIOUS

PDF

78.4 KB Created: 2021-03-03 18:08:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b7197331523c9ead491b0380121d5593 SHA-1: 53ee07cd66557a100096d67283568a6970e903df SHA-256: d4550410b74f97733b0a959a9be56d1e124230abf8595645f51032446e2aa13b
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://gimoguvi.ru/wix?keyword=lancer+ffxiv+guide PDF link annotation
    • http://sujabupinoda.scienceontheweb.net/84293197850.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/how_to_schedule_roomba_880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449004/normal_5fdc50a21390a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472506/normal_5fd3a7154b5d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403816/normal_603f9a91f3408.pdfIn PDF document text
    • http://rabevazilogu.iblogger.org/wesoxifilegekewasomu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423442/normal_5fcb197488de4.pdfIn PDF document text
    • https://kobokudebixisog.weebly.com/uploads/1/3/5/3/135390699/2001819.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418000/normal_600aaf1f10a6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410216/normal_5feb9c745d0eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443325/normal_6039263bba71d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424361/normal_603f54983ed92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425926/normal_5fc5e7bb39446.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/balarama_amar_chitra_katha.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/74218120068.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/hellboy_2019_movie_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/vowel_digraphs_worksheets_grade_1.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/stock_market_live_feed_youtube.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/janik.pdfIn PDF document text
    • http://mugavividuroka.rf.gd/27338209733.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_off0000f461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF461 5048 bytes
SHA-256: 80737f0c1c1316772df890bff17c75da244c5f9df5a9627d1ded157e906178ec
font_01_sfnt_off000105af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AF 11796 bytes
SHA-256: 93fea2a51879e03f17558066ef31842f09f7e3a7cb73287de795ddca36190f52

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