Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f686774d012ad4…

MALICIOUS

PDF

113.1 KB Created: 2021-03-21 03:20:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9ccf301c9537e852de82ae490f12da12 SHA-1: 9ed7d30910f718024eb0ec57003cd9409199c1a0 SHA-256: 82f686774d012ad439cb4109304bb102dc16306bb1b461b848e08b163ea6afb7
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 0.9998

Heuristics 6

  • 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 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://lozipotod.ru/award?keyword=quod+aliquantum+pdf PDF link annotation
    • http://ru-1.casa/a_return_to_love_summaryn5kv4.pdfIn PDF document text
    • http://fuvagezilavez.mygamesonline.org/vodobevaxupijiridakod.pdfIn PDF document text
    • http://plafond.xyz/taco_bell_swot_analysis_20178ym1x.pdfIn PDF document text
    • http://nibajafij.medianewsonline.com/farikojemijafob.pdfIn PDF document text
    • https://balerezun.weebly.com/uploads/1/3/4/6/134665840/lasikeminezaj.pdfIn PDF document text
    • http://pedrons.space/banawoxozolufolukl4n9l.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/9014276.pdfIn PDF document text
    • http://mybatut.store/film_damour_en_streamingesv6x.pdfIn PDF document text
    • http://salea.site/los_10_principios_de_la_economia_definicion_y_ejemploshujos.pdfIn PDF document text
    • https://jinokafolamod.weebly.com/uploads/1/3/4/3/134310646/pabuwafinirox_basazo.pdfIn PDF document text
    • http://lnstagramsupportlives.com/game_maker_image_xscale_not_working08m1k.pdfIn PDF document text
    • http://bred-enligne.com/dictionary_full_name_meaningcoisn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_6aeb45e829644797b6160ee5df2f9b0b.pdf?index=trueIn PDF document text
    • https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_edb5b95bcfc744f0b63feff0b4918a4e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/god_is_a_matchmaker_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/sasakijelolosigavubukado.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/aaron_berlin_winston_salem.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/batman_the_killing_joke_joker_statue.pdfIn PDF document text
    • https://95c758d6-fd33-43c6-b5d0-f1f55e07e946.filesusr.com/ugd/cb0188_9f717a01ab8f413695b11dbb7c29d89e.pdf?index=trueIn 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_off00017be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BE5 5100 bytes
SHA-256: 8e03f9540e6b365a6926e1dfad798f08f18a2caa0ab4933a25f68dbc80e15139
font_01_sfnt_off00018d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D31 12536 bytes
SHA-256: 202e3c1567fbed718ad9282d4d696d89a9ce6374dadffcdb7e90b3330fe3f4d8

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