Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12bb4f6c3e216cf…

MALICIOUS

PDF

79.8 KB Created: 2021-02-21 12:44:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ecb54871770194b856d88072db0c2a63 SHA-1: 59311532d258e35f56dce12e6e3bc4a9a8368ef0 SHA-256: f12bb4f6c3e216cfe9a7f83eba2dbba680d6b2c472bb390353605064b720269a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various PDF files hosted on disposable domains and link farms, indicating a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/wb?keyword=deni%205100%20ice%20cream%20maker%20recipes PDF link annotation
    • https://cdn.sqhk.co/tuseliwi/idjBiba/personal_fitness_trainer_memphis_tn.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/jOTtgjT/razeliluzezumidexa.pdfIn PDF document text
    • https://cdn.sqhk.co/xekiparot/YgjsgeP/famous_movie_scenes_easy_to_recreate.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/hcsAifK/craigslist_maine_apartments_biddeford.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/9hbLDgg/dogwood_tree_images.pdfIn PDF document text
    • https://cdn.sqhk.co/fafujedajir/eXhdEia/43840054152.pdfIn PDF document text
    • http://letnesil.xyz/cause_and_effect_transition_words_worksheet1n43u.pdfIn PDF document text
    • https://cdn.sqhk.co/pozedezupase/ZMqicjj/dowezidebisuzar.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/VijNifX/lara_croft_go_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nokulebepoba/AYivkhc/50839213241.pdfIn PDF document text
    • http://cashfree.store/2013_dodge_avengert2ajt.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/F79jhHr/72445843503.pdfIn PDF document text
    • https://cdn.sqhk.co/gijosevozu/agegcjd/jeluxanovimibafifirada.pdfIn PDF document text
    • http://jiviruke.iblogger.org/kizubowatexuwuxawelezem.pdfIn PDF document text
    • https://cdn.sqhk.co/gokovolasula/oz7gehc/52939276195.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://magufabag.rf.gd/boboiboy_galaxy_episode_18.pdfIn PDF document text
    • http://nuvijexuwafado.rf.gd/titinobitoligomokixut.pdfIn PDF document text
    • http://vaterojot.epizy.com/antidiabetic_drugs_chart.pdfIn PDF document text
    • http://vipagepegavazus.epizy.com/98793840772.pdfIn PDF document text
    • http://jowesokawebape.epizy.com/how_to_maintain_weight_loss_after_sleeve_gastrectomy.pdfIn PDF document text
    • http://tubulufegufixo.rf.gd/litikudabub.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_off0000fb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8C 5428 bytes
SHA-256: 2c1beb1bb264f1afbad57c471a738c8d8502535d00cfe4a91d08d62544800217
font_01_sfnt_off00010dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFC 10568 bytes
SHA-256: 1e1ca41a4361f920ed6f4637b8f141eb685fc9e98ab7a518776c9f8638e7dcb1

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