Malicious PDF — malware analysis report

Static analysis result for SHA-256 c39d0af73c879ed1…

MALICIOUS

PDF

77.7 KB Created: 2021-03-03 20:50:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 729f9b3c5b847f921293106673afcd76 SHA-1: bb576e5cc8ad099ec1aa8059716aeb30cc878f91 SHA-256: c39d0af73c879ed1556356e12adfc858aa9a83e7e2419ed3cf0a3ad7195f28f2
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains numerous embedded URLs, many pointing to disposable hosting and link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, appears to contain search terms, further supporting the phishing lure.

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://kuzutuzo.ru/123?utm_term=where+can+i+buy+computer+parts+in+person PDF link annotation
    • https://cdn.sqhk.co/vamunidibu/geiihjr/skyblock_ip_address_pc.pdfIn PDF document text
    • http://dafusunefu.iblogger.org/jedurukemoberewibatorivar.pdfIn PDF document text
    • https://rejurikin.weebly.com/uploads/1/3/1/0/131070637/3501366.pdfIn PDF document text
    • https://tizevilujiv.weebly.com/uploads/1/3/1/4/131406709/telovesit_bijidaxamep_muwemokolamem.pdfIn PDF document text
    • https://kikizesojumare.weebly.com/uploads/1/3/4/7/134718780/tixipuzunezonu.pdfIn PDF document text
    • http://idealicaitalia-official.site/what_happens_in_the_end_of_eleanor_and_parku6st5.pdfIn PDF document text
    • https://cdn.sqhk.co/supuzeren/i0ifgcj/25641453801.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/ijijdjg/4_pics_1_word_answers_6_letters_horse.pdfIn PDF document text
    • https://cdn.sqhk.co/wanevakaxuma/djebnC7/20523330064.pdfIn PDF document text
    • http://arfeshome.com/what_are_you_doing_answer_english8frpf.pdfIn PDF document text
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/43274ce6e9ba.pdfIn PDF document text
    • http://neyroskakalka.site/add_vectors_in_polar_formcjq3k.pdfIn PDF document text
    • http://zoxejusozowevo.iblogger.org/anime_slayer_pc_apk.pdfIn PDF document text
    • https://wobereresexo.weebly.com/uploads/1/3/1/6/131606335/460184.pdfIn PDF document text
    • http://s7hmus.org/biblia_romanaj355e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jilewotixa.epizy.com/dizusovib.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/embryology_book.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/ostrich_farming_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/australian_christmas_invitation_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/cadillac_xt5_2019_manual.pdfIn PDF document text
    • http://bagegamejejupu.epizy.com/49690598886.pdfIn PDF document text
    • http://pisepivowunasi.rf.gd/final_fantasy_xiv_weaver_leveling_guide.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF173 5396 bytes
SHA-256: b945fc0b1b6099b87587444c2ef6e157b88af41d7048e0b23234bc8d44bded5e
font_01_sfnt_off000103b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B0 10988 bytes
SHA-256: bc67b72f0b68bf167331f89272f2dcf13f1a7cfd6af6366b900fdf8a4d8d6c75

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