Malicious PDF — malware analysis report

Static analysis result for SHA-256 9247820bb50caee4…

MALICIOUS

PDF

80.5 KB Created: 2021-04-06 04:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: fe5849839a1d0f22fa11bd569a348454 SHA-1: def26bbd6a7118c3812543a6a825b418efa91b0e SHA-256: 9247820bb50caee43ddba4170b2efc5075f7f1818c6a91d2a7c129f287be511a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a domain associated with a link farm. The document body, though heavily obfuscated, contains text that appears to be part of a lure, and the presence of external URIs suggests an attempt to redirect the user to malicious content. No scripts were extracted, but the overall structure and heuristic firings indicate a phishing or malware distribution attempt.

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://maypoin.ru/strik?utm_term=does+the+night+mother+run+out+of+quests PDF link annotation
    • https://xigowepuge.weebly.com/uploads/1/3/6/0/136082497/6854607.pdfIn PDF document text
    • http://daliadiago.com/pemagazog73d7h.pdfIn PDF document text
    • http://jawixogu.mygamesonline.org/61317899406.pdfIn PDF document text
    • http://carishr.com/tegiwifured56l6l.pdfIn PDF document text
    • http://paselon.getenjoyment.net/asus_x205ta_cannot_boot_from_usb.pdfIn PDF document text
    • http://dimax.website/65148696795s6397.pdfIn PDF document text
    • https://botabire.weebly.com/uploads/1/3/4/6/134629411/9625549.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/dictionnaire_de_l_acadmie_franaise_8e_dition.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/tuxivaketasepudojasijalik.pdfIn PDF document text
    • https://telavepifamika.weebly.com/uploads/1/3/4/3/134352802/jodijigefe.pdfIn PDF document text
    • http://bestplacefor.rest/5681382555095kzi.pdfIn PDF document text
    • https://giruwaferelesed.weebly.com/uploads/1/3/4/8/134850821/nozudafibefumeros.pdfIn PDF document text
    • https://musegozaxugovu.weebly.com/uploads/1/3/0/8/130873783/2378058.pdfIn PDF document text
    • http://lofitner.buzz/troy_bilt_2410_snowblower_spark_plugwl4yp.pdfIn PDF document text
    • https://fuwurobo.weebly.com/uploads/1/3/0/8/130814642/72a12.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xikabuw.epizy.com/69057220176.pdfIn PDF document text
    • http://bototiluwoge.atwebpages.com/48505522651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a671923d-ebe3-46cf-8e39-b916d53d17f3/whirlpool_cabrio_gas_dryer_thermal_fuse.pdfIn PDF document text
    • http://xenelerowem.rf.gd/auto_mechanics_for_beginners.pdfIn PDF document text
    • http://wikiwixeparu.epizy.com/waste_disposal_problems.pdfIn PDF document text
    • http://giwoxig.rf.gd/noxubixopavewuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8539536c-339c-40eb-8e87-0f3502b70323/68383834094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a725a6-5185-40f6-9785-80cdfeb6df4b/what_are_mimosas_made_of.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cf077f9-8706-4d67-b7d0-e60932eee402/rv_furnace_not_working_at_high_altitude.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_off0000fc8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8E 5064 bytes
SHA-256: 3c64b4c9bea8af17b6ea5341b8b69d355c4c06b0661b033ba1d9bd91ff546f46
font_01_sfnt_off00010da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA7 10996 bytes
SHA-256: 51703622433a52c9bdedf4c43cfc9afeeb9ebe73f48946e555ec7a0d01868839

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