Malicious PDF — malware analysis report

Static analysis result for SHA-256 afdd93d61a8360a4…

MALICIOUS

PDF

88.8 KB Created: 2021-04-19 05:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3c776d62eb29d85ba858bd305aadbb3 SHA-1: ae4d73c27695eb77e011df51bf8dee2e5ed61d5b SHA-256: afdd93d61a8360a4dab951d3efad36d45b37c6c1a7d5b50a5296af8ab543d530
156 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the structure suggests the document's primary function is to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/strik?utm_term=how+to+program+schlage+deadbolt
    • https://vipofobusaxipol.weebly.com/uploads/1/3/4/2/134234766/8790760.pdf
    • https://cdn.sqhk.co/bulixanejad/mjaHrp5/40166828695.pdf
    • https://cdn.sqhk.co/febapaji/jgGiahb/snow_white_evil_queen_crown.pdf
    • https://cdn.sqhk.co/fovudadeweto/eWDhjgh/larololibemoriwix.pdf
    • http://gopumapi.iblogger.org/jexilovemelem.pdf
    • https://cdn.sqhk.co/wexunaveb/NgY6cij/app_box_android_iptv.pdf
    • https://ligelonajoka.weebly.com/uploads/1/3/1/4/131407163/relajug.pdf
    • https://cdn.sqhk.co/bexefoboxevi/Qijhja8/dulukagabom.pdf
    • https://rorezumi.weebly.com/uploads/1/3/4/5/134591247/ferarexowize.pdf
    • https://viwefinorix.weebly.com/uploads/1/3/0/8/130813514/748b09c.pdf
    • https://wazalitewisoka.weebly.com/uploads/1/3/5/9/135960923/forebepi-taboganazobesiv-bibifodelafuxi.pdf
    • http://wibetunutivemi.iblogger.org/wubakolewupotijabik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dilalixurapa.epizy.com/detailed_lesson_plan_about_adjectives.pdf
    • https://6a421494-2577-4416-904f-e17348f56b63.filesusr.com/ugd/85e76a_33d0c92b74fb48b8882c9d4622922c85.pdf?index=true
    • http://kakofuwogo.epizy.com/nef_beginner_teacher_s_book.pdf
    • https://uploads.strikinglycdn.com/files/7c290554-ecff-4087-863b-ccf59d4632d8/peavey_classic_50_212.pdf
    • https://uploads.strikinglycdn.com/files/2664fb29-84d4-4ddc-864c-6b53975626c7/acer_aspire_e15_laptop_charger.pdf
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_8c6227bed89046dda4fc268fef363228.pdf?index=true
    • https://uploads.strikinglycdn.com/files/aea82b40-31d6-43b2-91b8-a51755b71b9f/tepevonuluxadodeg.pdf
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_9d4791138ea54018a147a925e1b5cbe9.pdf?index=true
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_209f707637b04e838fa55d073c7fb3a3.pdf?index=true
    • https://27420876-d215-4860-9a72-f48db0d0c320.filesusr.com/ugd/4062c2_75fbc839e222487f86603612db672538.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0277ad72-a8b7-4541-bae8-7d675f273ba9/como_se_hace_un_manual_de_identidad_corporativa.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_off00011b2b.bin
83f698752940876008514559d6fe81eab819fc0fc568a0a62d63eb8c40135e63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2B 5680 bytes
font_01_sfnt_off00012e5e.bin
8627bde5d906c8cddd328a730c4b27c403c038772f0ae2eb42500a37d4403ee5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5E 11632 bytes

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