Malicious PDF — malware analysis report

Static analysis result for SHA-256 7939930049080756…

MALICIOUS

PDF

87.3 KB Created: 2021-05-01 20:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5c7f6482c27c1741bd70502a59761251 SHA-1: 286651235b8427482ce2bca72463a9cfe4464554 SHA-256: 7939930049080756128fc9027aadb2fedcd0c2a03130779bf9ab7d398a78a86d
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting, and a heuristic identified it as a link farm. The document body, though heavily obfuscated, suggests a lure related to a 'blank map of the world printable'. The presence of external URIs and the nature of the heuristics strongly suggest this document is designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=blank+map+of+the+world+printable PDF link annotation
    • https://mudujisobugabe.weebly.com/uploads/1/3/4/5/134511382/widosikomapulogig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465938/normal_5fcce89e69230.pdfIn PDF document text
    • https://mawetifatine.weebly.com/uploads/1/3/2/6/132683292/2caaf2.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/jb9Fija/38561031247.pdfIn PDF document text
    • https://fupuvoriru.weebly.com/uploads/1/3/4/4/134494751/ziguful-mibililifuf-kamevemewudag-besolelebex.pdfIn PDF document text
    • http://idealicaitalia-official.site/59052328430xg2qu.pdfIn PDF document text
    • https://cdn.sqhk.co/jimevexir/jgjj7ZS/86655760021.pdfIn PDF document text
    • http://prodit.space/cv_format_for_job_filepkhal.pdfIn PDF document text
    • https://pekedilude.weebly.com/uploads/1/3/4/3/134324883/4f4f7.pdfIn PDF document text
    • https://cdn.sqhk.co/gevagedubop/nwLiehj/58382862568.pdfIn PDF document text
    • https://xoluvaxabezil.weebly.com/uploads/1/3/4/3/134338990/3463631.pdfIn PDF document text
    • https://cdn.sqhk.co/daladovum/igjiQid/38467606285.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424009/normal_601f2984abbd4.pdfIn PDF document text
    • http://luferuvijudadof.22web.org/jagag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_6068f0f501eae.pdfIn PDF document text
    • http://duplicwcnj.space/ants_in_carsiqau.pdfIn PDF document text
    • https://cdn.sqhk.co/refevebux/hajH4KU/vukeguvegulur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/754420fe-e53a-4250-af24-57e84c4a238d/summary_of_merchant_of_venice_act_1_and_2.pdfIn PDF document text
    • http://letulirabe.epizy.com/99732150861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05d8ca36-a2c4-4b4b-9f44-eb700ec4ae28/why_buildings_stand_up_chapter_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5846f4cc-6c88-4405-9996-75c428c1cf07/how_to_heal_emotional_pain.pdfIn PDF document text
    • http://vinixozu.rf.gd/57918162751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/422f7d4e-26d4-46b0-a74a-9f3e39c1fd4a/how_to_program_my_samsung_bn59_remote.pdfIn PDF document text
    • http://vojakevid.epizy.com/zutewakupidebavebekutolo.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_off00011771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11771 5448 bytes
SHA-256: 6309eb2bc8612d327557c82e9d8844ea8942394932d6e69e92567c39e7c0f215
font_01_sfnt_off000129e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E0 11384 bytes
SHA-256: 175a7c351a6298c82ece01a3456c5dab9a681a4e84e1de28bb49a67151976740