Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f4a02b5204b3add…

MALICIOUS

PDF

78.8 KB Created: 2021-03-22 20:46:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d0a921361d93eb4a93a36fbcee066f93 SHA-1: c302b2d07b319db3128bb927957ee69ab19b2589 SHA-256: 1f4a02b5204b3add963b0eb87bee844f0b0fb542be1a2b77eba3710101916366
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely serves as a phishing or malware distribution vector. The document contains a large number of external links, many hosted on disposable domains, characteristic of a link farm designed to redirect users to potentially harmful sites. The presence of these links and the overall structure suggest an attempt to lure users into clicking through to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://midufefew.ru/wix?keyword=painted+desert+sheep+for+sale+near+me PDF link annotation
    • https://cdn.sqhk.co/wepunajexiju/jf3gdhb/nonokovawufaninud.pdfIn PDF document text
    • http://file-id.ru/cherrypy_post_form0k1jz.pdfIn PDF document text
    • https://cdn.sqhk.co/pusuvizodez/xgfjfij/smart_tv_best_buy_open_box.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/i3iaha1/85067218120.pdfIn PDF document text
    • https://cdn.sqhk.co/liviberox/Ojdidji/gutorikewusoxezufazodijo.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/jThagfO/bajaj_allianz_car_insurance_motor_claim_form.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/OW4gfia/wifi_signal_strength_test_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/TmiehdQ/titan_quest_switch_update.pdfIn PDF document text
    • http://xovitixekewelom.scienceontheweb.net/full_forms_of_computer_abbreviations.pdfIn PDF document text
    • http://hightrade.club/defozukizanikuzozizavebfds2.pdfIn PDF document text
    • http://finofubamu.mygamesonline.org/fijoveze.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/how_to_tone_up_your_abs.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/jfjdido/necromancer_spectre_build_poe.pdfIn PDF document text
    • https://cdn.sqhk.co/nofoxanu/hhhSjis/rugudetarorifasaxilazer.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/iBuZRjh/88397293309.pdfIn PDF document text
    • http://tanijijud.sportsontheweb.net/addition_word_problems_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/naveropifo/ifhiDgg/gogo_live_tv_not_working.pdfIn PDF document text
    • http://fbcopyright-center.com/conair_hair_clipper_guards93qmy.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://e590c0d9-b694-44fb-9862-47327b30d8b0.filesusr.com/ugd/89363e_0c628fb2099a4b33944813ee10be842c.pdf?index=trueIn PDF document text
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_d3564bfeea254a799b64ab6a4394580c.pdf?index=trueIn PDF document text
    • http://niwimugosaz.onlinewebshop.net/chemical_pathology_textbook_download.pdfIn PDF document text
    • https://a146b927-ed54-472d-b3a8-6b137e313b92.filesusr.com/ugd/4d400c_36e85fe1484f4f4793be9d8185ba0904.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE888 5068 bytes
SHA-256: 7dcc5ed6056ab619283841427b6d1a0cfb819878b108960bf7336db1a8496db1
font_01_sfnt_off0000f98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98D 11132 bytes
SHA-256: 2d4d5b50b298ae23c89936425d6d4ce6b91a13ecdaf89a4ca3b935a3bb002f88
font_02_sfnt_off00011f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F78 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3