Malicious PDF — malware analysis report

Static analysis result for SHA-256 111f6d8e61c0fd4e…

MALICIOUS

PDF

75.5 KB Created: 2021-03-13 13:15:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 63df0d060203503825bb89e020395bca SHA-1: a497ff419cc20bb22238990236fcd38d8a45d613 SHA-256: 111f6d8e61c0fd4e718fa3e7ea1a5fb59bcaf23b5983b3f1369667f3341e3e23
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The document body, though heavily obfuscated, contains text related to 'how to put bose speaker into pairing mode', suggesting a lure to trick users into clicking malicious links. ClamAV and ML classifiers also identified this PDF as malicious, likely due to its phishing and trojan characteristics.

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 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://bologen.ru/strik?utm_term=how+to+put+bose+speaker+into+pairing+mode PDF link annotation
    • http://vumonivaxozutod.mypressonline.com/51578741311.pdfIn PDF document text
    • http://shoes-storie.club/26489674396pkv86.pdfIn PDF document text
    • http://oneitstore.pro/62412814530lhu5y.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/chcNjau/download_urban_car_simulator_unlimited_money.pdfIn PDF document text
    • http://dontbeshy.xyz/ap_by_john_updike_character_analysis0hetj.pdfIn PDF document text
    • http://italysummer.space/bolewutetuidd55.pdfIn PDF document text
    • http://mugedly.xyz/tappan_stove_top_partsz7ssq.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/gchcoY7/brawl_stars_tier_list_november_2020.pdfIn PDF document text
    • http://labincom-med.ru/sodastream_fizzi_one_touch_glass_bottleslnix6.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/gDMheVe/new_york_times_word_game_app.pdfIn PDF document text
    • https://cdn.sqhk.co/mixubiki/CPL1giA/electronic_dance_music_artists_80s.pdfIn PDF document text
    • https://cdn.sqhk.co/pipujevi/iab78ic/los_angeles_olympics_2024_jobs.pdfIn PDF document text
    • http://thedopemarketing.com/zojuzosafa9.pdfIn PDF document text
    • http://optarfes.com/70929795616xnum3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_aba99db9ca2f47ada624c1c667e1dfb5.pdf?index=trueIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_c8d288a00c3d4ab5b6381a6eb2a759ff.pdf?index=trueIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_d1a11b4a06144d2b93c0f4365b1b2cca.pdf?index=trueIn PDF document text
    • http://jezevenakos.myartsonline.com/4150960861.pdfIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_93a0a13ba83c4713be9b83018d4ff749.pdf?index=trueIn 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_off0000eadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADD 5504 bytes
SHA-256: 1dd7b15827c5c3ab083b3ce6456bb3c133bb568817130e3e873da797f28c8c14
font_01_sfnt_off0000fd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD87 10392 bytes
SHA-256: ffbe7ee80168bbfca297c0532b87b7dc23bba6be96dcc4fe0ef2430ae29377b0

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