Malicious PDF — malware analysis report

Static analysis result for SHA-256 af9889cfe073684a…

MALICIOUS

PDF

77.6 KB Created: 2021-03-22 20:38:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1528968d46d7a948ec47d61deca56b87 SHA-1: 92104489379ec5dba2e0ff677c591f32e016e95d SHA-256: af9889cfe073684a264cf99c4fc917f64ac5fe5d093c66fd199044dd3f728e06
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 0.9996

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://crophysi.ru/aws?utm_term=plantronics+backbeat+fit+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/wutalididow/gcgdjjk/master_of_knife_chapter_10.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/wGejctr/adobe_illustrator_2017_link.pdfIn PDF document text
    • http://wisecreditscore.info/what_is_network_security_basicsumusr.pdfIn PDF document text
    • https://cdn.sqhk.co/nomazotesi/UQjhicE/vemukabulapudew.pdfIn PDF document text
    • https://cdn.sqhk.co/xezexasag/WjFifUv/taming_wild_domestic_cats.pdfIn PDF document text
    • https://cdn.sqhk.co/polopomoset/PMDUhcA/59189671557.pdfIn PDF document text
    • https://junetowumudi.weebly.com/uploads/1/3/4/5/134506976/kixarupevegomuxepi.pdfIn PDF document text
    • https://cdn.sqhk.co/fatepotax/GXii6gi/kijixukolobazefupi.pdfIn PDF document text
    • https://narodejezagog.weebly.com/uploads/1/3/3/9/133988416/zinaduk-dakunizo-ravuligexagupud.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/paigjwj/prepper_food_list_for_a_month.pdfIn PDF document text
    • https://cdn.sqhk.co/webunojixisa/jdgg9hb/hello_dolly_recipe_with_butterscotch_chips.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/itgFjaI/arunachalam_tamil_full_movie_tamilyogi.pdfIn PDF document text
    • https://cdn.sqhk.co/rawatajizefu/Pjajfid/26456577456.pdfIn PDF document text
    • http://wibeminijifenu.22web.org/adobe_acrobat_9_pro_reduce_file_size.pdfIn PDF document text
    • http://ruroraratotu.66ghz.com/97800805807.pdfIn PDF document text
    • http://buybritishcat.com/59349714626a66er.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ae82265-c2df-4c06-a77b-19e0fbe5dde4/twilight_2008_full_movie_in_hindi_dubbed_download_filmyzilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bfb2095-3a69-4a8d-bcdf-572d7ea8266d/rokunexufikawol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08ba6d35-a206-4a0e-9674-80e262bd91dd/41820614885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2133728-eb94-4614-9e78-aa337a5958f5/48495550851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92a07022-d6df-4ae6-9ec9-d2a8b2c5c66e/son_of_alexander_the_great_malayalam_movie.pdfIn PDF document text
    • http://sedunadilame.rf.gd/garegudezoluguzagemi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB03 5504 bytes
SHA-256: 08d14797d6b221b2eaa09a4019d4ed6ca2e540b3088dbfec5b56e0b235f8f48d
font_01_sfnt_off0000fda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA4 12860 bytes
SHA-256: b3df13bc7b0fdd6c76308d06600ce27530499187757a3f9ee3a72361d487b42e

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