Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d7d26ca7188c751…

MALICIOUS

PDF

82.3 KB Created: 2021-03-03 06:54:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: df9fa37aea5d3964814c06f68a0ddc5a SHA-1: 46c506d331a08b1f5fc9c96edf1fe1b9d0c09324 SHA-256: 2d7d26ca7188c751eaa0581be13ca8705a07898ccf27567ea57ea38592504d0f
184 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier, specifically flagging it as a redirector and a link farm. The embedded URLs, such as 'https://crophysi.ru/123?utm_term=now+you+are+testing+my+patience+meaning', point to known malicious infrastructure. The document's structure and content suggest it is designed to lure users into clicking these links, likely leading to further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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/123?utm_term=now+you+are+testing+my+patience+meaning In PDF document text
    • http://roxelejabojafe.scienceontheweb.net/my_smoke_detector_keeps_beeping_three_times.pdfIn PDF document text
    • http://boxberry-24.cc/how_do_i_set_up_voicemail_on_my_panasonic_home_phonegxcfp.pdfIn PDF document text
    • http://sayfelengs.space/xatuxofenogivopek2jnob.pdfIn PDF document text
    • http://flowerport.shop/networking_interview_questionsmfh67.pdfIn PDF document text
    • http://ductsunlimitedins.com/pokajepozajopijugqwnk.pdfIn PDF document text
    • http://nominasacra.ru/cetoacidosis_diabetica_y_estado_hiperosmolar_hiperglucemicobvitb.pdfIn PDF document text
    • http://topstop.site/dyson_ball_animal_vacuum_attachments30a0s.pdfIn PDF document text
    • http://bapatavusirave.mygamesonline.org/joes_crab_shack_menu.pdfIn PDF document text
    • http://sputnews.com/6272691760d8sk9.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/mop_pvp_vendor_horde_bfa.pdfIn PDF document text
    • http://getveran.site/9666421821140lf4.pdfIn PDF document text
    • http://xemakaze.mywebcommunity.org/majilekuvorutijobovu.pdfIn PDF document text
    • http://regse.website/basics_of_indian_stock_market_downloadjswwj.pdfIn PDF document text
    • http://world-wild-shop.com/what_is_the_purpose_of_separation_of_powers_and_checks_and_balancesv3lvd.pdfIn PDF document text
    • http://steelsho1.club/penusikevikunuz80h0n.pdfIn PDF document text
    • http://redita.fun/exo_cbx_for_you_piano_sheet_musiciy0h4.pdfIn PDF document text
    • http://vas-rem.ru/48858657447sbxju.pdfIn PDF document text
    • http://iqecoportal.ru/507361803235fz8k.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
    • http://zesafemumibow.myartsonline.com/guxataveduremuvikux.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_off0000f4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FB 5268 bytes
SHA-256: 6c4261ce03939a38f5240f33b9a1b904927f334e215742292adc3c2c3ca2c6ef
font_01_sfnt_off000106e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E7 11328 bytes
SHA-256: 0af19598b8d7ba150a5c9276ce8e70870b08281739a3dbccaf7c4d029ff9325a
font_02_sfnt_off00012d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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