Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddabd9a6c624ce48…

MALICIOUS

PDF

69.5 KB Created: 2021-02-22 22:58:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9c4b02cf9cf295b19ce7a6de52ac6d29 SHA-1: 38e3ef06957f81ba96e09af2402ecc0adaf5f918 SHA-256: ddabd9a6c624ce480ed4d32797267d81b9a2d559384c6659c9ce240589ed1709
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of embedded JavaScript, though not explicitly detailed in the provided evidence, is a common technique for obfuscating malicious redirects or initiating further malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=tp-link+tl-pa4020pkit+powerline PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446035/normal_60199175a3251.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/4aidvhd/80635474257.pdfIn PDF document text
    • https://ketuvukelese.weebly.com/uploads/1/3/4/3/134351906/fanutolabosog.pdfIn PDF document text
    • https://kiradaropamun.weebly.com/uploads/1/3/1/0/131070158/0d7fe1dea.pdfIn PDF document text
    • https://cdn.sqhk.co/giruzegovu/1NVHN4t/lighthouse_point_homes_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/idgfNDr/ice_blast_marlboro_price.pdfIn PDF document text
    • https://munelexogetajax.weebly.com/uploads/1/3/1/4/131437313/40a19365d3f.pdfIn PDF document text
    • http://covid-19online.site/ecmo_circuit_priming_guidelinem71jq.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/JUigUE1/60755896050.pdfIn PDF document text
    • https://cdn.sqhk.co/tegatiwuwax/fZjiWyZ/merge_shapes_in_powerpoint_office_365.pdfIn PDF document text
    • https://watoniworawi.weebly.com/uploads/1/3/4/8/134871767/maturo.pdfIn PDF document text
    • https://cdn.sqhk.co/sugefixa/jfQidPa/favefulejuwigo.pdfIn PDF document text
    • http://topsale.pro/shiva_panchakshari_stotram_lyricsqb9k5.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/4d6b57f5d2c5683.pdfIn PDF document text
    • https://cdn.sqhk.co/botuvawezej/gche6ih/bibobabuxabelovujogapigiw.pdfIn PDF document text
    • http://kogefidol.iblogger.org/alistar_guide_probuilds.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guduzazuki.epizy.com/atrophia_maculosa_varioliformis_cutis_images.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD472 5136 bytes
SHA-256: fe5e73b2ff045868a3b4529af3a09b720ee542938ca9c0b48aee727c588ee610
font_01_sfnt_off0000e61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61A 10248 bytes
SHA-256: bb4a242072474936a9c313e46fbd04850416271bd27ed859113b2d2f64b4d99e

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