Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a141ac253a9e46…

MALICIOUS

PDF

101.7 KB Created: 2021-03-18 13:12:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1530d08bc8c4b39f3da80f7d110b98f9 SHA-1: 151c4e877067f84d3b7dc53ea36ea95b16cd8cc7 SHA-256: 89a141ac253a9e465d7231700456ff7c23758e760a2dd3a1ab7d0ac1dbb3c3f0
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://maypoin.ru/strik?utm_term=crochet+for+dummies+patterns+free PDF link annotation
    • http://ujjjrrrrr.space/4_your_eyes_only_album_download_free8zbs8.pdfIn PDF document text
    • https://giruwaferelesed.weebly.com/uploads/1/3/4/8/134850821/6685625.pdfIn PDF document text
    • https://mubasaji.weebly.com/uploads/1/3/4/8/134846322/gumon_wofotede_ratuxewumegok.pdfIn PDF document text
    • http://sollabs.xyz/3643104816543hvs.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/RWygjS6/37287626873.pdfIn PDF document text
    • https://cdn.sqhk.co/jozazixefuf/Pgcjfjd/99693842407.pdfIn PDF document text
    • https://buvonumonub.weebly.com/uploads/1/3/5/3/135304713/dulameponopibo.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/phdibhc/xaxigakavipurefe.pdfIn PDF document text
    • https://vukuwapebu.weebly.com/uploads/1/3/5/3/135310377/xulefaxot.pdfIn PDF document text
    • https://cdn.sqhk.co/ratufewebu/jigfjft/kpop_piano_bts_tiles_game.pdfIn PDF document text
    • https://cdn.sqhk.co/wujejelot/jfkhgwE/lijebapuwijan.pdfIn PDF document text
    • https://banafazag.weebly.com/uploads/1/3/4/3/134325205/zutoz.pdfIn PDF document text
    • https://cdn.sqhk.co/fofotixoz/6TJMdKF/murder_mystery_movies_on_amazon_prime_video.pdfIn PDF document text
    • http://chistohome.moscow/game_of_thrones_book_6_release_date_20207d3ko.pdfIn PDF document text
    • https://cdn.sqhk.co/kewusikata/vqWlfhd/zurojumufiwetopijelazixum.pdfIn PDF document text
    • https://cdn.sqhk.co/silakozafi/Bic2icg/99337908555.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/jevedijadiki/center_tapped_transformer_multisim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ddbb147-dd00-4f15-8af4-f7c6e9ec836f/rekezo.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/dukedirobuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7285b3fc-ac22-4f38-8ebc-26adb205bf10/vumosexo.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_off00014e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E84 5268 bytes
SHA-256: 6106d42927a03ab7d2adda63d3a5c043ba9319d7fb73a04d8c4d67bbdbd33182
font_01_sfnt_off00016044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16044 12624 bytes
SHA-256: 47151bc24d2e318bb97372697af9590ab988b88b9a15d5cbf33c2e6950a8c08f

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