Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a174120ac322491…

MALICIOUS

PDF

82.4 KB Created: 2021-03-18 02:05:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76826c0c96a6e0a3066ae194f8286c19 SHA-1: 7b083dd4f5056de7e92a334b9401a3a1f674c4c7 SHA-256: 1a174120ac322491c591385f5dcd734604d8d570d8fee4c280650ae0af35b370
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, with many pointing to disposable domains and hosting, indicating a link farm or phishing lure. ClamAV and ML classifiers strongly indicate maliciousness. The presence of multiple external URIs suggests the PDF's primary function is to redirect users to potentially harmful websites, likely for further exploitation or credential harvesting.

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://resalured.ru/award?keyword=activities+to+teach+vocabulary+in+english+pdf
    • http://saxobupazes.sportsontheweb.net/dish_network_remote_code_for_samsung_dvd_player.pdf
    • http://igme.site/76447176990crdsj.pdf
    • http://kokolonesafu.getenjoyment.net/warusifunixijivomi.pdf
    • http://moxegelubopidi.sportsontheweb.net/w3schools_.net_tutorial_free_download.pdf
    • http://goldstein.berlin/what_is_common_law_in_sao8ed6.pdf
    • http://minosijasif.mypressonline.com/45587925655.pdf
    • https://pofimutazotoxo.weebly.com/uploads/1/3/4/0/134000188/9054994.pdf
    • http://wbigs.space/jepevimefajomoxm53bt.pdf
    • http://beririka.scienceontheweb.net/94823907712.pdf
    • http://copyrightviolationcenters.com/niyps_mini_camera_manualvkm2j.pdf
    • http://lirebuwoke.mygamesonline.org/86442890489.pdf
    • https://bixagitiwor.weebly.com/uploads/1/3/4/6/134618264/3847075.pdf
    • https://bipilebel.weebly.com/uploads/1/3/1/6/131606150/fonotimode-rugadebiduvubo.pdf
    • http://nepatokada.mypressonline.com/zipilegitiriwozasesuraw.pdf
    • https://kivowitu.weebly.com/uploads/1/3/4/7/134703836/ac668f.pdf
    • http://kyukty68.xyz/98542062970d46t1.pdf
    • http://pifadopagel.scienceontheweb.net/kuzibuneniralutexesevofow.pdf
    • http://nubigawe.22web.org/vurejewew.pdf
    • http://nikaold.site/how_to_install_miracle_heat_reclaimerewicw.pdf
    • http://xalenupom.getenjoyment.net/fezexokasukafux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nelaxufap.rf.gd/28218932980.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010472.bin
1ee0abb6c27e0d39b1934b85bfb26ac002782599fcac334acc5ce4c8d571020c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10472 5708 bytes
font_01_sfnt_off000117e9.bin
38f18d82ce27f8873771e36ce713336169409b7494b235892e0ed795d0fbdf86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117E9 10820 bytes

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