Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8479a1d073ecb7…

MALICIOUS

PDF

80.6 KB Created: 2021-03-06 22:12:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecd59fa027935dd5664ca1a46b4df56b SHA-1: 908ed0fba1f5a06d076dc12cadce842e5d88ab3a SHA-256: 5d8479a1d073ecb783bf396a8ae312797571006303302b1e57e511927ec5acca
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest malicious content, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment used to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/wix?keyword=dead+zed+2+hacked+unblocked+weebly
    • http://vodabutopidaru.getenjoyment.net/55623034498.pdf
    • http://fofolep.mywebcommunity.org/what_is_a_major_reason_the_renaissance_began_in_the_italian_city_states.pdf
    • https://fusonunobowur.weebly.com/uploads/1/3/0/8/130813531/zomogelosanoxato.pdf
    • https://cdn.sqhk.co/zetobazox/Vcic21d/encyclopedia_set_value.pdf
    • http://wutesokafuzirew.iblogger.org/11658526363.pdf
    • http://tidirakozodawon.getenjoyment.net/how_to_fix_laser_on_ryobi_miter_saw.pdf
    • https://nudabubi.weebly.com/uploads/1/3/4/3/134323665/gorejenek_fosijogikovow_xekujin.pdf
    • http://pasipodo.mypressonline.com/keurig_2.0_regular_coffee_maker.pdf
    • http://sakivometo.medianewsonline.com/gobisato.pdf
    • http://pofuxubilet.sportsontheweb.net/nazagevojaset.pdf
    • http://gudelew.mywebcommunity.org/poulan_model_p3314_carb_adjustment.pdf
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/84d6e4ec72de007.pdf
    • http://jewuzalozegeso.iblogger.org/fire_mage_leveling_guide_vanilla.pdf
    • https://cdn.sqhk.co/zinazejoras/jjVgfH3/safety_clothing_beaumont_tx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vawerudarasikow.myartsonline.com/43189449404.pdf
    • http://mojigoka.atwebpages.com/sundance_spa_capri_owners_manual.pdf
    • http://disoluje.myartsonline.com/walmart_tv_wall_mount_with_shelf.pdf
    • http://bevevekafoli.epizy.com/kuromomezaxari.pdf
    • http://fawaxadil.epizy.com/vulufaparusoxeronujaw.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f7.bin
c9485d8b3624ac92cefe4958c4415bd79f7c4f750261a650bc72a120f1b31cfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F7 5332 bytes
font_01_sfnt_off0000fc41.bin
3c55fd89b631c1188fd5d06cc6613128ae7dc9ca499d6324f14a918d8f311b1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC41 10188 bytes
font_02_sfnt_off00011f73.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F73 16092 bytes

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