Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc000cd465a2772…

MALICIOUS

PDF

102.5 KB Created: 2021-04-05 01:39:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 51c0d49c066b8122dd7511d58a1e445f SHA-1: 532215b5280fac6b1a0b24aefdd9871e6a34c3bd SHA-256: adc000cd465a277228e004084486527abab6ccdaa28106f3cd124f1b97fa325f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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://jacksth.ru/wix?keyword=ino+naruto+grown+up PDF link annotation
    • https://cdn.sqhk.co/desixurate/hficgf9/67926872232.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/jbbWgjY/46434698751.pdfIn PDF document text
    • http://shtangennstutkupitseychas.xyz/lojasebyoep.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/gihhiPA/86380865936.pdfIn PDF document text
    • https://cdn.sqhk.co/dejijadu/9idjEjf/zen_virtual_pinball_machine.pdfIn PDF document text
    • http://webmastervlad.ru/the_black_eagle_charge_bladeejw8z.pdfIn PDF document text
    • http://braco.ru/goddess_lolita_sperm_bank_donation_download21ilz.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/jeOajdU/earnings_per_share_calculator_template.pdfIn PDF document text
    • https://cdn.sqhk.co/perigupa/ucBha3k/58790193117.pdfIn PDF document text
    • https://cdn.sqhk.co/takularozo/gghicij/inside_out_and_back_again_characters_ages.pdfIn PDF document text
    • http://apkweb.net/903772962031bdom.pdfIn PDF document text
    • https://cdn.sqhk.co/xewafazuk/cNE50Oe/green_bean_casserole_paula_deen.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/cji0hfA/zuvejag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f62b48df-e59d-4c69-81cb-938df21a8b6c/34941604646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8df74ffc-9450-405c-b23e-5122ef464f8d/what_are_some_examples_of_exaggeration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1d14750-1d1f-4082-8d35-e863fc1e5a01/gexiju.pdfIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_a01de78c4a6d4ac1bcf09b78a0697e2e.pdf?index=trueIn PDF document text
    • https://69f1164a-dcd3-4310-9fb4-3b67f03bdbb0.filesusr.com/ugd/9d7282_e95c2adfc4254cdca09514e1a3660647.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000138bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BD 8740 bytes
SHA-256: a0a2f0b75b656e85578676f4984a56a85496ba9ef315422de4ca44469ed18e93
font_01_sfnt_off00015617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15617 4804 bytes
SHA-256: 338dc4ff56b651b7c9b595b2342b87cbbd055a3ded59f64e68d8f477faffdb8c
font_02_sfnt_off00016696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16696 11064 bytes
SHA-256: bf54684b0c591ab04fa02502664765dacd1dd87bf4966d8932e38ff17b44bd9f

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