Malicious PDF — malware analysis report

Static analysis result for SHA-256 354d892dda0b41ec…

MALICIOUS

PDF

84.1 KB Created: 2021-03-16 06:19:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0ae6610917d8d1557b18691eb27ae8f4 SHA-1: b3121c792a96c863684d90819ec58d2a697397ae SHA-256: 354d892dda0b41ec307f8085f6bc73afcaa65783d1f1a0d70894e1dd56cfc271
146 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://nipisod.ru/wix?keyword=dark+brown+drawer+track+guide+and+glide PDF link annotation
    • http://my-favshoph.online/xakosadalatetjdcjq.pdfIn PDF document text
    • http://bluebadgeapproval.com/peronemises75bfo.pdfIn PDF document text
    • http://rewita.fun/is_hbo_max_on_amazon_fire_stick04bov.pdfIn PDF document text
    • https://cdn.sqhk.co/govazofaj/cQFLslu/regal_cinemas_14_gainesville_fl.pdfIn PDF document text
    • http://samelike.site/teachers_pay_teachers_gift_certificateserv0i.pdfIn PDF document text
    • https://cdn.sqhk.co/nubenirosife/cii0srZ/island_survival_minecraft_servers.pdfIn PDF document text
    • http://ndfnasg.xyz/fapisatalam1t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2065f6f1-29fb-48ac-a230-4f4ab2d4b746.filesusr.com/ugd/b62953_555b2dd13ef940b8afeadf4afbb6ede6.pdf?index=trueIn PDF document text
    • https://49884795-3b66-401c-adaf-b59e999553af.filesusr.com/ugd/8bd6c9_3306356b5efa4b9cb6808d153987f8a3.pdf?index=trueIn PDF document text
    • http://togujekunigek.rf.gd/63124250688.pdfIn PDF document text
    • http://kunaraxanoxun.epizy.com/92336549885.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/3287492561.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/coincidence_i_think_not_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/contemplated_definition_english.pdfIn PDF document text
    • http://bavotuvezomevi.myartsonline.com/advantage_and_disadvantages_of_internet.pdfIn PDF document text
    • http://pikimavijepe.epizy.com/55343278503.pdfIn PDF document text
    • http://wepaxilex.epizy.com/star_wars_trumpet_sheet_music_easy.pdfIn PDF document text
    • http://lurarapekakaka.atwebpages.com/17522812639.pdfIn PDF document text
    • https://19508648-7f28-415f-8121-b57715dc1465.filesusr.com/ugd/9734e7_183f7a8dd92c4cfab51558800f3c1ea7.pdf?index=trueIn PDF document text
    • http://forojiwimudobo.atwebpages.com/todig.pdfIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_67087a2231254e4dbc4600e72229077f.pdf?index=trueIn PDF document text
    • https://5a995288-ce6f-4ae3-a3e6-14272d8003db.filesusr.com/ugd/7be1cd_24c86b95c87f43279e0bc82b5d0aad09.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_off0001089e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089E 5224 bytes
SHA-256: c1d4dedbe00dbca17e7617dda24afa230cdc575167d023fb6adeb574cad3652d
font_01_sfnt_off00011a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8C 11676 bytes
SHA-256: 5e05961048acc83346b6fe311a4646f2c3e2bda9ecf0f53fbd2e084f7cfa6f8d

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