Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a70691636e5d613…

MALICIOUS

PDF

76.2 KB Created: 2021-06-13 20:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 18c860c2b4b65993666b77b4d6f98a66 SHA-1: 855ae142f1150b45102d08531a86d2bc2ee928ca SHA-256: 7a70691636e5d613801697fcd57e23c329ab1e6714fd5820f1008f71b871d14c
226 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to distribute malware or unwanted software. The presence of a URL related to 'adobe photoshop cs10 free download full version with crack' and a heuristic firing for 'LOLBin token sequence in document text' further supports a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://drafthe.ru/pbw?utm_term=adobe+photoshop+cs10+free+download+full+version+with+crack PDF link annotation
    • https://tajubebejuxota.weebly.com/uploads/1/3/4/4/134477440/27022.pdfIn PDF document text
    • https://jatupixi.weebly.com/uploads/1/3/1/3/131398141/3538030.pdfIn PDF document text
    • https://nexolibevi.weebly.com/uploads/1/3/4/4/134463206/lixozirixuxare-rulelofum-lovomiw.pdfIn PDF document text
    • https://gadufekovofu.weebly.com/uploads/1/3/4/7/134764592/pikigejenobas-gigot.pdfIn PDF document text
    • https://toviwapomini.weebly.com/uploads/1/3/4/7/134727984/bc3788b143.pdfIn PDF document text
    • https://fekobuwag.weebly.com/uploads/1/3/1/8/131858403/9781582.pdfIn PDF document text
    • https://womagojewe.weebly.com/uploads/1/3/5/9/135961056/3098eacfe2d24d.pdfIn PDF document text
    • https://zudupati.weebly.com/uploads/1/3/1/8/131856533/fofelasu.pdfIn PDF document text
    • https://fenanasu.weebly.com/uploads/1/3/1/3/131384656/leruk-nikojukam.pdfIn PDF document text
    • https://leputixoted.weebly.com/uploads/1/3/2/6/132683438/701668.pdfIn PDF document text
    • https://sakeneri.weebly.com/uploads/1/3/4/3/134339958/f4abea8075a9.pdfIn PDF document text
    • https://fedutozenizojem.weebly.com/uploads/1/3/4/6/134662960/e7461f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/db07974b-f064-4f2b-9899-0b96244c3461/power_xl_air_fryer_cooking_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee06f9e1-1079-4213-bd3a-0d49ae4f09a7/mebamaleravakuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/761e2d61-20ad-400c-9c78-7a377b8fb21f/cmd_command_to_show_all_ip_addresses_on_network.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dbdacba-1b41-4b3f-adfd-c2034315d42a/25795990886.pdfIn macro / runtime command snippet
    • https://uploads.strikinglycdn.com/files/7455f504-4f32-4a20-a32d-fd5b9633d667/zibejumivimug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/573c9bd5-f07e-4137-8aad-f5e2ab952d82/19862279338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bfab823-30e5-49c0-8d29-fea0b3fa1a3c/inc_and_grow_rich_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a32f3580-a32c-4013-b20a-ee35f50759eb/behind_closed_doors_book_movie.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6F 5664 bytes
SHA-256: db35d417a2773890535b7fb1b433dd3a6bc58cc25451a5ffb73fefc154034be9
font_01_sfnt_off0000f1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C7 10228 bytes
SHA-256: 9144aa6a0cef32817356c7a5c3a09f8e22487abb43f0c433ef633f61dd2ee071
font_02_sfnt_off000114d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D9 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3