Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e87dfc6456f583…

MALICIOUS

PDF

76.7 KB Created: 2021-02-25 13:49:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a971dbd3d221d5441a37145049c7dec7 SHA-1: e11df28c2a9eb1abe186989bde2bc3fa786e7a4f SHA-256: 07e87dfc6456f583df50e8aa776f1b2ea5a29696a2479d50fd3d02bbcca46369
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to Weebly-hosted PDFs, indicating a link farm or SEO spam campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

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=marcy+weight+bench+set+sam%2527s+club
    • https://zideloxilatomi.weebly.com/uploads/1/3/5/3/135325243/1717645.pdf
    • https://kifeketefisub.weebly.com/uploads/1/3/5/3/135347095/girowevamotaxemu.pdf
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/614d5781fd059e0.pdf
    • https://luvofebujapima.weebly.com/uploads/1/3/0/9/130969865/6890263.pdf
    • https://zupagefu.weebly.com/uploads/1/3/1/0/131070313/690785.pdf
    • https://joralonu.weebly.com/uploads/1/3/1/6/131607047/zijabelev.pdf
    • https://babulavired.weebly.com/uploads/1/3/0/7/130775389/muwovapufekowa.pdf
    • https://gifuroromila.weebly.com/uploads/1/3/4/3/134377961/tasadazuwiwolafid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ditiruz/free_pictures_of_nature_beauty.pdf
    • https://s3.amazonaws.com/runuzitexokol/pisamaxirokiveloj.pdf
    • https://s3.amazonaws.com/divelatoxa/32102946689.pdf
    • https://s3.amazonaws.com/dagasopones/confidant_guide_iwai.pdf
    • https://s3.amazonaws.com/bakoloj/65888729265.pdf
    • https://s3.amazonaws.com/ropuba/bevepurekibamofeduju.pdf
    • https://s3.amazonaws.com/naxozelozude/dining_table_design_guidelines.pdf
    • https://s3.amazonaws.com/bupaxomu/black_mamba_transformers_ls-_03.pdf
    • https://s3.amazonaws.com/sojenozap/32731153001.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da74.bin
a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA74 6440 bytes
font_01_sfnt_off0000ea68.bin
1d61f7236ff8ff2146cd183ad0ba1c086b3052cb03d80c95c16d46e09bc5e079		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA68 5588 bytes
font_02_sfnt_off0000fd67.bin
ca05c0ab9306ea58c627e97a17c89ec72877e421ffa100f96e097b33fd198c64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD67 11500 bytes

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