Malicious PDF — malware analysis report

Static analysis result for SHA-256 965823ce894d26b5…

MALICIOUS

PDF

80.5 KB Created: 2021-03-23 16:18:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 121f086148b7f02ed394d6f48cf20cdd SHA-1: 62265b9cfe636d563cc42cc2d9e2303f32e27fcc SHA-256: 965823ce894d26b506d92087f997d316e1f2a1c917cef6ffaa052fa4f5d347dc
146 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating a high probability of maliciousness. The 'SE_CALLBACK_LURE' heuristic specifically points to a callback phishing or tech-support scam pattern, where the document likely prompts the user to call a phone number. The presence of numerous external URIs, many hosted on disposable domains, further supports a phishing or scamming intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://maypoin.ru/award?keyword=audit+acceptance+letter+format+pdf PDF link annotation
    • http://silujokiz.mypressonline.com/94604731155.pdfIn PDF document text
    • https://cdn.sqhk.co/karewura/kB5WK31/levis_jacket_size_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/sobekalob/ishgcha/exo_piano_tiles_kpop_2019.pdfIn PDF document text
    • http://raisinshq.pro/autocad_2016_crack_version606jq.pdfIn PDF document text
    • http://sepozimog.scienceontheweb.net/xekosamogakijebumuva.pdfIn PDF document text
    • https://cdn.sqhk.co/dudosugebo/sZYSjjH/best_portable_rechargeable_digital_radio.pdfIn PDF document text
    • http://copyrightreports.com/gifisinovirepukasaxaa8d.pdfIn PDF document text
    • http://jovefupe.mywebcommunity.org/accommodative_excess.pdfIn PDF document text
    • http://callipakk2.site/44172323207eirvo.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/Aggijdo/new_buildings_in_dubai_silicon_oasis.pdfIn PDF document text
    • http://jepisafidezegun.scienceontheweb.net/wagirakixozif.pdfIn PDF document text
    • https://cdn.sqhk.co/kufedefivuvu/UdWQzKJ/super_slime_ben_online_game.pdfIn PDF document text
    • http://remont-pc.website/luwofaparumduoaj.pdfIn PDF document text
    • http://lipuwisapi.mywebcommunity.org/agent_agreement.pdfIn PDF document text
    • http://suraneb.scienceontheweb.net/statistical_methods_freund.pdfIn PDF document text
    • https://cdn.sqhk.co/fezusife/imAeQoc/pop_rock_artists_list.pdfIn PDF document text
    • http://melowew.scienceontheweb.net/13406656753.pdfIn PDF document text
    • http://mandarins.space/zubatugocpj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pazepoxi.atwebpages.com/fundamentals_of_molecular_spectroscopy_colin_n_banwell.pdfIn PDF document text
    • http://kofepiropi.onlinewebshop.net/geometric_sequence_activity.pdfIn PDF document text
    • http://jifimurosesapu.atwebpages.com/calligrapher_s_bible.pdfIn PDF document text
    • http://zugepoguj.onlinewebshop.net/why_is_my_thermostat_not_kicking_on.pdfIn PDF document text
    • http://poborunedajemo.onlinewebshop.net/80731802542.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_off0000fe6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6B 5112 bytes
SHA-256: ca862d7aa97a40476aa5a528b4e158d38787bb11116b2655cabe300fb0a90986
font_01_sfnt_off00010fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBF 10916 bytes
SHA-256: b977b7668edf5d9b1e6dc7d002c062db62d86598909c3fb9f8c030d5a55c196f

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