Malicious PDF — malware analysis report

Static analysis result for SHA-256 76bced41d2a91439…

MALICIOUS

PDF

77.1 KB Created: 2021-02-21 08:20:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 6d78081580b4a36c1a725de08103b74f SHA-1: 6d704a36d89558e6ac77ae53726082f1bb939481 SHA-256: 76bced41d2a91439f2add7736cdcc6daea4cc78845ec2ce76f1ae71dbc0f830b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL leading to a suspicious domain that appears to be part of a link farm designed for SEO manipulation. The document body, though heavily obfuscated, contains text related to a product name and application details, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://leonvi.ru/123?utm_term=can%2527t+stop+won%2527t+stop+concealer+nyx PDF link annotation
    • https://cdn.sqhk.co/nixivezez/ig4Sjgi/xemifegojebunetiriwu.pdfIn PDF document text
    • https://cdn.sqhk.co/zunezafi/khdjehd/vejam.pdfIn PDF document text
    • http://normal-id.com/a_first_course_in_complex_analysis_solution_manual42j1s.pdfIn PDF document text
    • https://cdn.sqhk.co/zalivelo/jwLT4Ys/tujikofegixumo.pdfIn PDF document text
    • http://kegeminu.iblogger.org/22126509177.pdfIn PDF document text
    • http://ropufogesuzazeg.iblogger.org/information_technology_job_description_small_business.pdfIn PDF document text
    • https://cdn.sqhk.co/panosiritu/oCjgTjc/31563566703.pdfIn PDF document text
    • https://cdn.sqhk.co/wozepefiga/aTzhe6S/53908592153.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/hie0pif/wasar.pdfIn PDF document text
    • https://cdn.sqhk.co/vagewovupug/EDhdiiz/flights_to_vegas_from_chicago_o_hare.pdfIn PDF document text
    • https://cdn.sqhk.co/kotoweraga/icmUiad/3193978984.pdfIn PDF document text
    • https://cdn.sqhk.co/pemiduwegam/ghhhaGS/vezawafujabisoko.pdfIn PDF document text
    • http://laitlabs.pro/93683002402apphg.pdfIn PDF document text
    • http://dmgameplan.com/break_it_down_lyrics_lil_woadiejg2g1.pdfIn PDF document text
    • http://pshcomonhere.xyz/69561175869f1b6y.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/e3hfqxS/runescape_grand_exchange_market_watch.pdfIn PDF document text
    • https://cdn.sqhk.co/rixutixim/IgjU2Uu/redolonolitij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fatisake/30171015415.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/anaconda_2004_telugu_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/android_browser_that_blocks_autoplay.pdfIn PDF document text
    • http://xawatutosewo.epizy.com/beginner_synonym_formal.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAA 4984 bytes
SHA-256: 2b10a47cb9e50c49b68fdaf5fbdc618b3db58ad83315e0ad083321812c59bd06
font_01_sfnt_off0000efd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD0 12640 bytes
SHA-256: a10330834cd5efff896ac1139be6a27227d8b7b83a0128d7ce389c860155b285
font_02_sfnt_off000118a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A7 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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