Malicious PDF — malware analysis report

Static analysis result for SHA-256 65fdcf9a8f592682…

MALICIOUS

PDF

96.9 KB Created: 2021-02-15 23:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b8231f2339aac4eae0c6c77644b39cb6 SHA-1: 03e1f924a5f7ad9941d9337c7b629ffa71a0b293 SHA-256: 65fdcf9a8f5926827a0caa0986f189ea004a5206bb106313fe2a7d3f3bb0b934
222 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, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/strik?utm_term=sri+rudram+namakam+lyrics+in+telugu In PDF document text
    • https://ragixadimeruwu.weebly.com/uploads/1/3/4/8/134897014/tabawezojorotesiro.pdfIn PDF document text
    • http://litamomun.22web.org/lizesizu.pdfIn PDF document text
    • https://rukinedofixod.weebly.com/uploads/1/3/4/3/134348838/gozoripozeg_wumub_leresaxoluba_wowovize.pdfIn PDF document text
    • https://xuvivodoxanujo.weebly.com/uploads/1/3/5/3/135308848/rewovuvogi-lomerebigak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/tulosa/wukizajimus.pdfIn PDF document text
    • http://petekukeseji.rf.gd/android_x86_7._1_not_booting.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/hallelujah_chorus_satb_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/43698420611.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/gikewisut.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/nufogeberixomin.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/boss_me_25_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/fun_day_itinerary_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/adobe_suite_6.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/93801435842.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/bafinojed.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/wapking_movies_hollywood_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/sifivowixow.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001204c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1204C 5528 bytes
SHA-256: ebdbdd12867a02f9fbd949ba15dc528b0fedcc6172de73ad0fbeee8bae13d4b4
font_01_sfnt_off0001330b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1330B 2140 bytes
SHA-256: f46e6372de50a2cbde1f8bdabbbab189751cb3bd88e87a1552b81ba7dbba52c8
font_02_sfnt_off00013c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C7B 4924 bytes
SHA-256: 3fd46683cb1698be86519a1603afa2b41d58a3ba3ef879ef6c4c3caea3992e1c
font_03_sfnt_off00014e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E5D 12676 bytes
SHA-256: 86e2d1bd690da7a1114c306c33fd5c87c435d2a3d3832e521ea5a25effb505e8

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