Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b22cbf3de1ab74d…

MALICIOUS

PDF

88.0 KB Created: 2021-04-18 13:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 391b53e0fe4e0e7b39a9503f808913f5 SHA-1: ce0ddc50ff85b12951c124bbb6fad96a8bc0f1ca SHA-256: 2b22cbf3de1ab74dc09d6034a8921a22cdbfb288168a957757551723b7ce9a0c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • 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 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://jacksth.ru/strik?utm_term=what+does+the+postman+rings+twice+mean PDF link annotation
    • https://cdn.sqhk.co/jidulopavoji/ajcigbX/gnomes_garden_2_level_18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383921/normal_5fe2a3506cfd9.pdfIn PDF document text
    • https://funopazotasar.weebly.com/uploads/1/3/1/0/131070342/nanakudi-wamajojawuva-xobodiregino-bosudamakazem.pdfIn PDF document text
    • https://loxazubak.weebly.com/uploads/1/3/0/7/130739809/8431309.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/6tihehj/pottery_making_classes_for_adults_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/gisopagipize/OhghjaT/5163723235.pdfIn PDF document text
    • https://rusepokobedog.weebly.com/uploads/1/3/4/3/134366979/bac17cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405674/normal_5fe92a003ce68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407996/normal_5fc875fb29d61.pdfIn PDF document text
    • http://gasiwine.iblogger.org/mufodedawoz.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/zHgjijh/world_popular_mobile_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446650/normal_5ff45b8ecd4e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jekidosokun.epizy.com/94584601939.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/53107894993.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/accession_register_template.pdfIn PDF document text
    • http://fusifovizit.rf.gd/ashcroft_technology_academy_uniform_shop.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/extract_tar_linux.pdfIn PDF document text
    • http://nivajunupoz.epizy.com/29352641202.pdfIn PDF document text
    • http://bujazux.rf.gd/how_to_say_ghost_of_tsushima_in_japanese.pdfIn PDF document text
    • http://fovelevewud.rf.gd/77347350065.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/pentair_easy_touch_manual_heat.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_off000119e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E3 5560 bytes
SHA-256: 8621dfa9e982a2f508496e608badb95159e6636d70ea27e1af943bbf7193e06f
font_01_sfnt_off00012cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CBF 11168 bytes
SHA-256: d9754095385ec50a935551a3cec3bc43cafb3ba33541ea0d292d12065d4276aa

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