Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c14ac468be46a38…

MALICIOUS

PDF

82.0 KB Created: 2021-04-01 04:36:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e765434fb7e0d7b846bcb41be8b6ae85 SHA-1: d860e1974e0f32c055c88826117b8ea8458d1e7a SHA-256: 2c14ac468be46a385f7f8b566317ac2b9b9e6c838420960ed97e03be111128d9
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to a recipe, which is a common tactic for phishing or malware distribution. The presence of embedded URLs and the link farm heuristic indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=feta+pasta+recipe+vegetarian
    • https://xejukosaxup.weebly.com/uploads/1/3/1/4/131437924/a80c9eb67adc0.pdf
    • https://cdn-cms.f-static.net/uploads/4486192/normal_6064191fa1a8b.pdf
    • https://lekikibobasiva.weebly.com/uploads/1/3/5/3/135350768/tuvapixuti.pdf
    • http://tewekuzuka.iblogger.org/zejukidumexabedakezepogu.pdf
    • http://kodepovorivapi.mygamesonline.org/centroid_and_center_of_gravity.pdf
    • http://kosamaritaj.getenjoyment.net/benafuramorofo.pdf
    • http://rorafosuwis.22web.org/gotododato.pdf
    • https://rifopiponekusu.weebly.com/uploads/1/3/5/3/135346758/9b08ff18ac6.pdf
    • https://monisobagarov.weebly.com/uploads/1/3/1/8/131856119/kanemidojax.pdf
    • http://giwitijudaleka.mygamesonline.org/18290414292.pdf
    • https://cdn-cms.f-static.net/uploads/4468563/normal_60305a852e48d.pdf
    • https://xomugiwonin.weebly.com/uploads/1/3/4/2/134266294/343084d8e.pdf
    • https://cdn-cms.f-static.net/uploads/4468838/normal_605c49ba666ce.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://judejelalub.rf.gd/mamikaba.pdf
    • http://suferipuwa.epizy.com/rezizexaronajoditemomowe.pdf
    • http://xawiwevivuzox.onlinewebshop.net/livro_candlestick_em.pdf
    • http://bexukavibume.myartsonline.com/cuisinart_keurig_coffee_maker_not_pumping_water.pdf
    • http://batapijas.myartsonline.com/abruptio_placentae.pdf
    • http://doriponesarom.myartsonline.com/94371777717.pdf
    • http://muwaziri.epizy.com/gijanepebowejokevafe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f37d.bin
d324d4581646bcc6272f023b904c9445d831697ebf6ef39bdcea14f4d4a4d579		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF37D 5084 bytes
font_01_sfnt_off000104dc.bin
cb159cc9d714520fdf604515834a8e5d6ccdf81551317d8133b939af7313f940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104DC 6068 bytes
font_02_sfnt_off0001148c.bin
adfe050511f05fbd15b1b9b3195ed8eb9f241311a324d996c2d03d0e622772e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1148C 11360 bytes

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