Malicious PDF — malware analysis report

Static analysis result for SHA-256 05cf34341e277b8b…

MALICIOUS

PDF

101.1 KB Created: 2021-03-21 02:14:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e39b39ee3a207e837fcffeac854d46d2 SHA-1: dd92dd65d9f55c4ba4006a87fe42fee17de76ee8 SHA-256: 05cf34341e277b8b0c512b18bd6833ba114567b0134a53b6a8abb1420881cb3e
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly and other free hosting services, suggesting a link farm or phishing operation. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, and the 'ML_NYX_PDF_MALICIOUS' score is very high. The presence of embedded URLs and the ClamAV detection further support a malicious classification, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lozipotod.ru/aws?utm_term=english+speaking+practice+online+india
    • https://dupasaku.weebly.com/uploads/1/3/4/2/134235895/755c332a63b1cca.pdf
    • https://vavaterojitenoj.weebly.com/uploads/1/3/4/8/134898986/6684906.pdf
    • http://sevowina.medianewsonline.com/loduwadixup.pdf
    • http://zugemenelil.medianewsonline.com/patterns_of_world_history_brief_third_edition.pdf
    • http://samekuk.22web.org/91589302243.pdf
    • https://xotikavetaj.weebly.com/uploads/1/3/4/8/134861849/d86d6a750b.pdf
    • http://lerimofo.mywebcommunity.org/ford_transit_van_oil_change_light.pdf
    • https://wefizaxire.weebly.com/uploads/1/3/0/9/130969527/2947697.pdf
    • https://puxonuge.weebly.com/uploads/1/3/1/3/131383548/8b2d28e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wilakozopo.rf.gd/30015975411.pdf
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_a11d0b016dcc4f379cd7fc67fd83f233.pdf?index=true
    • http://lamekukibudinos.epizy.com/loluxo.pdf
    • https://uploads.strikinglycdn.com/files/de00a546-d053-4e78-8e11-9baf47fe4424/three_phase_transformer_fault_current_calculation.pdf
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_a14e650de4ac4ee0a4f12079e5ffdeea.pdf?index=true
    • http://pojoviraxerojo.myartsonline.com/infinim_tone_price.pdf
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_4f0082c3943b414a90b0b60fb9fa838c.pdf?index=true
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_45697aac753b467ab02748afedba9c08.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4590ad87-0435-4264-bdd6-1b48c8c462ea/new_jersey_apartment_lease_forms.pdf
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_132257b62411419599b35079beb07976.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013836.bin
5c2e1103b046a608664dcf962f3db8fdfd2d1736952abacad1bdc7150510e5d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13836 5356 bytes
font_01_sfnt_off00014a6a.bin
a7890fb3f92c8f14e41e90c1fccf3b4dda8ce18eb029d21fcab68a4fdb463bc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A6A 11432 bytes
font_02_sfnt_off00017187.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17187 16204 bytes

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