Malicious PDF — malware analysis report

Static analysis result for SHA-256 7afca4a1bb269378…

MALICIOUS

PDF

84.4 KB Created: 2021-03-21 02:40:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: db8eb80492f76408c6800c0b8aeeae3c SHA-1: 72e6122c279dced781a4497ea0e0c19ddd3c5e3a SHA-256: 7afca4a1bb2693787ff0f831ff274dd9920536ec29bb51d9a92a675e1d771b4f
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spamming operation. The ClamAV detection and ML classifier indicate malicious intent, likely to redirect users to phishing or malware sites. The embedded URLs and the PDF structure strongly suggest this is a malicious document designed to exploit users through a phishing or redirection tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://leonvi.ru/wix?keyword=oc+maker+challenge+2020 PDF link annotation
    • https://vopasigujar.weebly.com/uploads/1/3/0/8/130813381/c8789ac6f11445.pdfIn PDF document text
    • https://pujofolowax.weebly.com/uploads/1/3/4/6/134669504/zunet.pdfIn PDF document text
    • https://kibopomirisusi.weebly.com/uploads/1/3/2/7/132741064/1cc63a56b99.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/1hhW5G0/31905085273.pdfIn PDF document text
    • https://povefedonigo.weebly.com/uploads/1/3/1/6/131637150/patolesozilogebefaje.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/HYjehhd/michael_vick_dog_fighting_quote.pdfIn PDF document text
    • https://cdn.sqhk.co/sijiposago/gFjcVTE/32241796524.pdfIn PDF document text
    • https://numuladak.weebly.com/uploads/1/3/4/6/134613837/nijuxos_firodaligun_nobupavilogubu_fedoze.pdfIn PDF document text
    • https://cdn.sqhk.co/zanemulazif/bjgiiHE/empire_total_war_politics_guide_united_provinces.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_16d2b4c3a8d04ae0a335ce795c8ce62e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/131f80d3-d7cb-4bb0-b319-82d7d72afcf1/how_do_i_get_the_battery_out_of_my_petsafe_collar.pdfIn PDF document text
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_78a38f7a5db741068579ebd53793af46.pdf?index=trueIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_8d72b1a2d57546f6b002979e2fb986ae.pdf?index=trueIn PDF document text
    • https://f11c4bf2-12a6-49f8-9590-07a94b689168.filesusr.com/ugd/11276f_ea316cc7d90a43e599fb4e87d1a9f107.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/86a8400c-cb15-4434-8827-5795443f1352/ps4_gold_wireless_headset_vs_pulse_3d.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/17085556767.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/exposure_ladder_worksheet.pdfIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_1b7ecf41a79c4c3481fe9098a07d8f83.pdf?index=trueIn PDF document text
    • https://d12d056d-c16f-42d2-bb36-b12dbd13f8e5.filesusr.com/ugd/a2005d_7e9d244905024853a6a5bae90174267e.pdf?index=trueIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_3825d4418f4e41488a1fa4ec4f52633b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/julaxel/my_cloud_home_pc_download.pdfIn PDF document text
    • https://7b4e975e-109f-4397-a679-93e438ff1453.filesusr.com/ugd/c33f71_e975ed875c764c619907a8455477460a.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD342 18372 bytes
SHA-256: e9b5a22ae3d74e8dc3ace210e447ca3dcb07318ab94bed83fab2ed4798625428
font_01_sfnt_off00010eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAF 5400 bytes
SHA-256: e32357349004a1cc13a6f3f10afef58b1141d28ed0ab1070bbc8df45d71898f9
font_02_sfnt_off000120e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E3 10304 bytes
SHA-256: bfa95496b8ceea6368e8e92970e7ecdfe72ed328d8cd8e42fc08e78037e6e6b7

Open this report in the interactive analyzer, or submit your own file for analysis.