Malicious PDF — malware analysis report

Static analysis result for SHA-256 442e0eba6b10148f…

MALICIOUS

PDF

83.6 KB Created: 2021-03-16 10:24:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 405463697133f23c4a1866f5d73308db SHA-1: 93622c15483e2d081be9c843c78a32bc498c3308 SHA-256: 442e0eba6b10148f23b98541626adb122a923a6900764e16075591b9b74e223d
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://leonvi.ru/123?utm_term=banner+shape+tool PDF link annotation
    • https://silavetej.weebly.com/uploads/1/3/5/3/135314504/subidudizalumariwu.pdfIn PDF document text
    • http://tetupamino.mywebcommunity.org/variables_affecting_counselling_process.pdfIn PDF document text
    • https://xowarumi.weebly.com/uploads/1/3/4/5/134519529/1670575.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/balemajodelililore.pdfIn PDF document text
    • https://woronawupewusor.weebly.com/uploads/1/3/4/6/134672267/zazejugi_mipalotobuf_kekakawetu.pdfIn PDF document text
    • https://tijesefufejeje.weebly.com/uploads/1/3/4/8/134858706/264982.pdfIn PDF document text
    • http://ginalupajeriw.scienceontheweb.net/bigger_than_i_thought_chords.pdfIn PDF document text
    • https://nidetufuw.weebly.com/uploads/1/3/6/0/136097009/7809359.pdfIn PDF document text
    • http://xesapuwax.mywebcommunity.org/biogenic_amines_in_food.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rokefobititu.epizy.com/kofewebopenoben.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/classic_rpg_games_for_pc_free.pdfIn PDF document text
    • http://gamojeliziri.rf.gd/67020500513.pdfIn PDF document text
    • http://gapibixofezutef.epizy.com/kapumurax.pdfIn PDF document text
    • http://tumofif.rf.gd/free_christmas_flyer_template_photoshop.pdfIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_61bfcf5be22a40fbb679804193eb6374.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/badla_movie_telegram.pdfIn PDF document text
    • https://cb38ef3f-1f2c-4622-8962-dca261660167.filesusr.com/ugd/3ae201_2b2ace5675654151b7bff00b920daccb.pdf?index=trueIn PDF document text
    • http://kagabefusexem.epizy.com/a_little_life_summary_spoiler.pdfIn PDF document text
    • https://f9fc249e-2e6a-4908-9eb0-88005465a50d.filesusr.com/ugd/2530ee_c2e01647737b40d8934c55729374dcf4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wovugi/human_centipede_movie_480p.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB2 4696 bytes
SHA-256: 0fa79c46ddce0b21fef9b9e624f554f108e6d95272cb032f16de63d0fca6d277
font_01_sfnt_off00010f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8D 10428 bytes
SHA-256: 99de28344fda53b3ed4d0dabf15026de0a82cddd4aa6e9f976343693055cf417
font_02_sfnt_off0001334e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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