Malicious PDF — malware analysis report

Static analysis result for SHA-256 d16185c52251ef4a…

MALICIOUS

PDF

71.9 KB Created: 2021-04-03 05:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1aebdb99d84f27efa121dda0a0ba566 SHA-1: 19f87db834b4810e9cbcb63177cce848209e9bc5 SHA-256: d16185c52251ef4a086890c59475348ddafd937bda994263a2f12a78261e1bb6
156 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, and contains a large number of external links, indicating a link farm or phishing attempt. The document body, though partially corrupted, suggests a lure related to a 'Nesco professional food dehydrator manual'. The presence of external URIs and a PDF link farm heuristic strongly suggests a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=nesco+professional+food+dehydrator+manual
    • http://cardioactiveitalia.site/89761813990hld57.pdf
    • https://cdn-cms.f-static.net/uploads/4393363/normal_6062afba53592.pdf
    • http://milesnires.xyz/q_see_camera_app_not_working0wej7.pdf
    • https://cdn-cms.f-static.net/uploads/4421218/normal_5fd19d026699e.pdf
    • https://cdn-cms.f-static.net/uploads/4424029/normal_602a0aca6b553.pdf
    • https://cdn-cms.f-static.net/uploads/4421339/normal_6028bc4bc3b19.pdf
    • https://cdn.sqhk.co/terasovo/heggrgd/37184160655.pdf
    • https://cdn-cms.f-static.net/uploads/4491451/normal_5fd148439cbaa.pdf
    • http://organic-ita.space/pc_de_ses_ykseltme1kevr.pdf
    • https://cdn-cms.f-static.net/uploads/4411250/normal_6039543e302e5.pdf
    • https://cdn.sqhk.co/xurajalijok/xHhigji/inside_out_2_release_date_2022.pdf
    • http://espacecmb.xyz/buku_syaikh_wahid_abdussalam_bali_pdyug0d.pdf
    • https://felezawobo.weebly.com/uploads/1/3/4/8/134896203/d17e54b43.pdf
    • https://cdn.sqhk.co/movijomo/SiapieP/70796687564.pdf
    • https://nunevebola.weebly.com/uploads/1/3/4/8/134846747/78fd134e2731.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/povodijirig/hellblade_senua_s_sacrifice_guide_trophe.pdf
    • https://s3.amazonaws.com/diwitapezu/activex_control_pad_windows_10.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da41.bin
dfc207495845b0dc4517fba2e24efd51fa71b0f4873550138206a28163fea128
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA41 5464 bytes
font_01_sfnt_off0000ecb9.bin
114b29836ab2753cac1286cc062fd38ada5b0bcc2d1e3aee255c87dc987fd1c9
pdf-font-stream PDF embedded font (sfnt) at offset 0xECB9 11128 bytes