Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f74a16f08ad0f7…

MALICIOUS

PDF

74.7 KB Created: 2021-04-18 06:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7072fce230930e875f98f5459c6b4571 SHA-1: 2f569f5fb091f1c1142668d8f6e816904ff270bf SHA-256: e0f74a16f08ad0f7af2a1d1b2cb8c82635357f05cdf9cd6cc4a81c26fecc0407
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. The file contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm or phishing lure. The presence of a 'powershell_cookbook_5th_edition7ofxk.pdf' string within the document text, alongside a suspicious URL, hints at potential exploitation or redirection to malicious content, possibly involving command execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/strik?utm_term=casio+g-shock+mudman+g-9300-1 PDF link annotation
    • http://yblda.fun/windows_powershell_cookbook_5th_edition7ofxk.pdfIn PDF document text
    • http://bigtittybella.com/panasonic_microwave_oven_nn-sn686s_stainless_steel_countertop_built-in_with_inverter_technology50sw0.pdfIn PDF document text
    • http://circus.market/442994950813wuy2.pdfIn PDF document text
    • http://bigtittybellIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_7229ecac716441ae8eb90db944bf2c19.pdf?index=trueIn PDF document text
    • http://vijoputu.rf.gd/facebook_video_url.pdfIn PDF document text
    • https://d5fd0048-bb8d-45a1-ba21-28d1cb0b7162.filesusr.com/ugd/5e8de6_dfeae382cc06415598cd6bf81be53a05.pdf?index=trueIn PDF document text
    • http://tepaduvofevog.rf.gd/96070907319.pdfIn PDF document text
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_3514185754dd4b5ba59f2d83a0210a55.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/birthday_video_background_music.pdfIn PDF document text
    • http://vituzitozitu.epizy.com/tipos_de_variedades_linguisticas_ejemplos.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/is_brazilian_jiu_jitsu_hard_to_learn.pdfIn PDF document text
    • https://4590046d-f0a9-4171-b8a0-56ff8c1fe63c.filesusr.com/ugd/0bfb20_3264f0815c1e44678fca7f9f9e4d81b6.pdf?index=trueIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_93f8b1958a02485bae2fd6404cc1ebe6.pdf?index=trueIn PDF document text
    • http://nomapalugaji.epizy.com/masuravutatijoxawitasefu.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/15426292220.pdfIn macro / runtime command snippet
    • http://volemefejosi.rf.gd/anesthesia_secrets_4th_edition_free.pdfIn PDF document text
    • http://vulikoviluxugu.rf.gd/91812308620.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/what_is_the_best_mini_dv_tape.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_off0000e3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A6 5740 bytes
SHA-256: 6e8702b023b8e277baab349368c71ce22e903acd5684a293b01e2a08366baf61
font_01_sfnt_off0000f70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70F 11216 bytes
SHA-256: a8e7fe7a6a380b2f2e84ba196a18693ddaa4b2f19695b6f4db0f5ff1f0f7939d