Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bfcd1c5bd910a90…

MALICIOUS

PDF

107.0 KB Created: 2021-03-23 01:34:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 903e96fea72f9cbe9aded4a5ce96242e SHA-1: 14c7d85057da6c09388f5a025cbbc986a4b5a662 SHA-256: 6bfcd1c5bd910a90b6cc8322ab9bbee43dd84fc3bc8e77a50b9a95a91ad925fd
156 Risk Score

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 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 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.
  • 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://pelibifir.ru/123?utm_term=transformers+characters+green PDF link annotation
    • https://cdn.sqhk.co/rorajakura/3Whdjb7/burudonudusupizudifefal.pdfIn PDF document text
    • https://dutaveporope.weebly.com/uploads/1/3/4/6/134600224/29008.pdfIn PDF document text
    • http://nncucuucuc.space/ap_style_state_abbreviations_in_textvmilg.pdfIn PDF document text
    • http://espacecmb.xyz/calculus_for_the_life_sciences_2nd_edition6rf37.pdfIn PDF document text
    • https://fisikovomit.weebly.com/uploads/1/3/4/6/134652659/5108713.pdfIn PDF document text
    • http://idealslimitaly.site/how_to_get_directv_remote_to_workgfrma.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/pkjhjev/facebook_sign_in_mobile_phone.pdfIn PDF document text
    • http://circleshtang.xyz/zozopuvobofawap4m5bp.pdfIn PDF document text
    • http://aazzzry.space/life_lessons_from_life_is_beautiful_moview3txn.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/tibWIja/z_nation_season_5_episode_13_cast.pdfIn PDF document text
    • https://denagivar.weebly.com/uploads/1/3/1/3/131383646/judik.pdfIn PDF document text
    • http://trikolor.site/68303215348xfmnc.pdfIn PDF document text
    • http://beremoter.online/hot_springs_vanguard_price_uklyvj8.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/xijalovelokolep/vuvonupanowagu.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/libros_abraham_hicks.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/kiligeri.pdfIn PDF document text
    • http://dafiwogi.rf.gd/tezipeluvatovavunabup.pdfIn PDF document text
    • http://zudujijikaj.rf.gd/circular_motion_worksheet_multiple_choice.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/granny_smith_hack_game.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/whirlpool_dishwasher_wdf320pads1_not_washing.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_off0001678c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1678C 5212 bytes
SHA-256: 03a26fe7b221e6e34cc9942fff42916491e4b07bfdc3f7c752bc7fc01634f643
font_01_sfnt_off0001791c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1791C 11088 bytes
SHA-256: a1b086348a8641170014930140842709b564c9c987cf193a7fd7929c920b7dfa

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