Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc243aab5b8f636…

MALICIOUS

PDF

66.7 KB Created: 2021-03-17 03:36:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 88ca3c39bde6703deb9573f70b24ee77 SHA-1: 94a0c4c2e8a1a7ef77af7e369d66db1bce89a271 SHA-256: afc243aab5b8f636e87db8c36f6e2f66a78531556461dd79984c06c9a3d80bd9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 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://dugedepap.ru/award?keyword=american+history+notes+pdf PDF link annotation
    • https://wipusometava.weebly.com/uploads/1/3/4/8/134846349/8983473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481397/normal_6045ea8b7eeee.pdfIn PDF document text
    • http://zodelem.mygamesonline.org/romantic_words_in_spanish_with_english_translation.pdfIn PDF document text
    • https://jerolukemotib.weebly.com/uploads/1/3/0/8/130874115/a84e78c69fc.pdfIn PDF document text
    • http://cardioactiveitalia.site/fbi_most_wanted_word_template59e8g.pdfIn PDF document text
    • http://eurosett.net/subtracting_fractions_with_regrouping_worksheetvwsjk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470523/normal_5fdf4a028acdb.pdfIn PDF document text
    • https://cdn.sqhk.co/fagiseregu/egeijtb/free_fire_try_now_in_jio_phone.pdfIn PDF document text
    • http://mx50off.info/88880121747j3m0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474997/normal_5fd8cf69957c0.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/nhcjb3w/72782521142.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/dadepobarurukites.pdfIn PDF document text
    • http://justiciaforjustice.com/nuvimojosotepitugijitplixm.pdfIn PDF document text
    • https://cdn.sqhk.co/remigalakefo/5he2Bo9/sotujigasu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404112/normal_6008bfa89d1f0.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/iiiaIge/pebagufoxaruropeligotorum.pdfIn PDF document text
    • http://hookup153.site/gewaje3cqmp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484807/normal_60335a324d42e.pdfIn PDF document text
    • http://zelopaqq.xyz/53411140482iu7zx.pdfIn PDF document text
    • https://cdn.sqhk.co/fusojafiza/fcCojdJ/hattricks_happy_hour_menu.pdfIn PDF document text
    • https://nebakeji.weebly.com/uploads/1/3/4/6/134649015/zazizuposekomexivig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pujumek.myartsonline.com/sabitegatajarojex.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_off0000c94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC94B 5456 bytes
SHA-256: e1e9bc7c831f4bc4071255c797706ba53c00a62293ad2fbb3edbbd44c03cbfce
font_01_sfnt_off0000dbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB8 10188 bytes
SHA-256: a83891e646b4111fcc61eedc339b348aead3481230bf69217ad34dc6c73e9c14

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