Malicious PDF — malware analysis report

Static analysis result for SHA-256 075133e1495bb933…

MALICIOUS

PDF

173.2 KB Created: 2021-03-03 04:30:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b7eb594611c8bc394530c7267a602888 SHA-1: a6973d1273b2c1cffbab51ddc5f0204244b19ebd SHA-256: 075133e1495bb933a69f8b417bc4bdfa1efd11998afc37dc2ffd0f5b3ce080d5
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to a calendar, likely serving as a lure to encourage users to interact with the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/wix?keyword=poplarville+elementary+school+2020+calendar+printable PDF link annotation
    • https://cdn.sqhk.co/fedelubu/Srjbgcp/5881697707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_5fe8ee4ce409f.pdfIn PDF document text
    • http://walletelectrum.buzz/blue_red_balloons_clip_artwlr6v.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/aibggUm/hot_rod_lincoln_lyrics_asleep_at_the_wheel.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosira/Yja9EQ1/41598704494.pdfIn PDF document text
    • https://jotulamopusojo.weebly.com/uploads/1/3/4/4/134465369/6772202.pdfIn PDF document text
    • https://lomelamul.weebly.com/uploads/1/3/5/9/135994015/326f3f1413.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/40615739599.pdfIn PDF document text
    • https://cdn.sqhk.co/lowixadoges/DjhixlJ/56169074921.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/harga_cartridge_printer_hp_laserjet_p1006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_602ed8ef7b5f3.pdfIn PDF document text
    • https://posajegodat.weebly.com/uploads/1/3/4/4/134477503/f5fa289ce86.pdfIn PDF document text
    • http://hotel-engels.ru/63294515815qkx77.pdfIn PDF document text
    • http://sks-expertiza.ru/36_questions_musical_endingeegqj.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/zgeLM5j/rebigosilidiwizegekun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://najukelosuned.myartsonline.com/nisinufuve.pdfIn PDF document text
    • http://nevabaza.atwebpages.com/family_therapy_with_dr._jenn_brittany_dejesus.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_off00026f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26F02 5892 bytes
SHA-256: 0b81afb36ebab2db3ab9713b80b22891df148d26360bf95f133326b45edec06e
font_01_sfnt_off000282e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x282E8 10308 bytes
SHA-256: 2dd086cd7cf02dafa8a598f2beada4305d2be7b5ea717993c3d442b5bf88e976

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