Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d67121abd3b5a76…

MALICIOUS

PDF

70.3 KB Created: 2021-03-20 11:12:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 13441183255792695247f7456cf28588 SHA-1: b708f1e4f851c578e9882e00b0f0948bcd170616 SHA-256: 8d67121abd3b5a76c567f6dfe7220a8c005a85dda9c99cb8a03a791fdc1fc28d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to external URLs, with one primary URL being https://mezovuduw.ru/strik?utm_term=how+to+fix+volume+on+verizon+remote. The document body, though heavily obfuscated, suggests a lure related to technical support or information retrieval, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=how+to+fix+volume+on+verizon+remote PDF link annotation
    • https://cdn.sqhk.co/zogowefu/jAjgW3w/swamp_thing_cw_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwuvume/aX2vsEN/maze_megaburst_space_manga.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/9J0sMgg/neloxajimi.pdfIn PDF document text
    • https://cdn.sqhk.co/vunofufi/hgCietM/company_profile_report.pdfIn PDF document text
    • https://cdn.sqhk.co/dawolesirip/fqjgTgf/81309418270.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7cd4a2f-a6c7-45dd-958b-dd570bba383f/xasivivorilodikudexesuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33fe6692-a45f-40c4-b44e-439dde5d9486/disney_world_free_dining_plan_2021.pdfIn PDF document text
    • http://kerevolagex.epizy.com/god_bless_my_daddy_lyrics.pdfIn PDF document text
    • https://1b2c4efd-c8eb-4b04-b26f-b9154d704720.filesusr.com/ugd/d3758e_8049ad3bfd7041a9a020c17f1c12c931.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lewuli/nasa_report_polar_ice_caps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e4675a-38a2-4853-b5e7-1f7a5c605f8d/96604528575.pdfIn PDF document text
    • http://mezifaxura.rf.gd/45633497575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1428d2fd-425c-4df9-bf00-fb1cffbd3eb4/mozuzazobavut.pdfIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_7f660297871944bea1581aac1281db8f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c1a1e45-6651-425b-857d-f30125d28016/sufusimiwekamemilosimuwew.pdfIn PDF document text
    • https://12dd324c-696b-4d67-8c19-991f3eacec2c.filesusr.com/ugd/eeb7bd_c59cfa2872d148f0ac30c263e2dfcbf9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/38c5bda5-73be-4417-a84f-525d4abc2825/womujijibudewokibosaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/789dfbab-364c-4c2c-b0c5-fa3e68597c0f/vugoxosoxusi.pdfIn PDF document text
    • https://d668ac4b-7052-46b9-8d0c-7e282d24ced7.filesusr.com/ugd/00fc84_86223a74281f42f7894e2c010cf5affd.pdf?index=trueIn PDF document text
    • http://telagivepovadul.epizy.com/dundas_peak_fall_color_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c340da2c-0a90-41ff-b303-c75e0cf950f0/61556605192.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/best_app_er_for_ios.pdfIn PDF document text
    • http://nikuzemadol.rf.gd/faselabajesoludizesakir.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/l_c_d_tv_ka_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/gunononomudukej.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_off0000d6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BA 4756 bytes
SHA-256: 679c506d94c45400eed8438223ff2298235bed9956ad5117d3029911992e1634
font_01_sfnt_off0000e6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EE 10716 bytes
SHA-256: 222d49d0698fbc1ecfaca4a2bba5f8139ee06168704564dbaf73988d05150dcc

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