Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb683622889a9684…

MALICIOUS

PDF

79.1 KB Created: 2021-03-11 17:07:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3a41b2bce0cd8cae0709527f6a959fcd SHA-1: 04b1acb40c61b10b454adf9bd9953a5c47a8d281 SHA-256: eb683622889a968465e9319581e57d8bbb6f25902d18a3dc26ed0e328de05805
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to drive traffic to potentially malicious sites. The primary URL, 'https://lozipotod.ru/wix?keyword=windows+7+emulator+for+android+apk+download', indicates a lure for users seeking specific software. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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://lozipotod.ru/wix?keyword=windows+7+emulator+for+android+apk+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378381/normal_5feba2102d824.pdfIn PDF document text
    • https://jitebemaduk.weebly.com/uploads/1/3/4/6/134692965/ruwuxesomugidi_gubebulod_kuxile_fesevekaworolar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393028/normal_6011b0c88ffc3.pdfIn PDF document text
    • https://menavexijipiges.weebly.com/uploads/1/3/4/5/134599349/2841807.pdfIn PDF document text
    • https://kazigujexumakul.weebly.com/uploads/1/3/4/3/134320364/mawas_lewolerarinezi.pdfIn PDF document text
    • https://savejoxip.weebly.com/uploads/1/3/4/7/134722189/suxezemo.pdfIn PDF document text
    • https://lajidusok.weebly.com/uploads/1/3/1/0/131070852/2953937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421049/normal_60293c6237134.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456982/normal_5fce7881762e1.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/76e4c3e3-845a-4d96-b714-97d038c5f497/what_are_the_data_analytics_tools.pdfIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_8fa0955427df4649bd62fd77cf6a9e34.pdf?index=trueIn PDF document text
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_c1c9eeb0be584c08b21eef9d09cb4648.pdf?index=trueIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_fb250fd9a24a4278ae3d3dc08ab84030.pdf?index=trueIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_0929a3395f7a45b494eed126a1ac07f9.pdf?index=trueIn PDF document text
    • https://200ee3fc-349d-4871-b5c3-2c1c69b60476.filesusr.com/ugd/7b00a0_b699f935db0e4625bb7d45cc7deaf03b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bf98561-693c-4299-b103-56061e18b559/14945182532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04ea5336-f081-416d-b20a-08762c4656ee/kovurukipigak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96701096-8aee-4aa5-8941-8caf126cbd98/what_are_the_methods_of_teaching_social_studies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/116cd73d-bace-41ec-a600-93da02e22b61/computer_hardware_books_for_beginners.pdfIn PDF document text
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_517f9080d79b426aa7203dade9c3c041.pdf?index=trueIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_f3d6cde828984a2aaf8da592e0d998d0.pdf?index=trueIn PDF document text
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_304f70a1a60e4fb590f1e6b9bd87e17b.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_off0000ec0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0D 5320 bytes
SHA-256: ffc95a23ecee0a0b8091e00f7d3c18c7e1bf5d9caad08fcf14406895fb715e95
font_01_sfnt_off0000fe20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE20 10224 bytes
SHA-256: f116301f1e1a0caf5cc73694cd26a1c5a7a2ac5e41c8950060ba321c439b34b4
font_02_sfnt_off000120c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C2 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378