Malicious PDF — malware analysis report

Static analysis result for SHA-256 87407efb47f16e8d…

MALICIOUS

PDF

77.7 KB Created: 2021-03-21 22:01:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fc920852bc177cf84d11c252619c463d SHA-1: b6a26989890cf08166aa28cf190aa8044a0e75f6 SHA-256: 87407efb47f16e8d06db3803afd445330f6270dc2bd487856836b3e771e07385
196 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The presence of a large number of external links, many pointing to PDF files, suggests a link farm or SEO poisoning tactic to distribute malicious content. The primary redirector URL, 'https://druttle.ru/123?utm_term=linkin+park+faint+live', is likely used to funnel victims to further malicious sites or downloads.

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://druttle.ru/123?utm_term=linkin+park+faint+live PDF link annotation
    • https://pakotoroxup.weebly.com/uploads/1/3/0/8/130815058/suxubi_gujoxujaxoti_fokorovafo.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/LAihg8R/jugozokuj.pdfIn PDF document text
    • https://cdn.sqhk.co/jexozumumanu/jjjMghW/mosuxuxawelol.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/gfhPyl4/tanglefree_blind_grass_knotted_sheets.pdfIn PDF document text
    • https://cdn.sqhk.co/wowedofu/dlgeAFM/guidestar_platinum_seal_of_transparency_2019.pdfIn PDF document text
    • https://gigerexug.weebly.com/uploads/1/3/5/3/135341911/pajowo_tewelavotak_lidizu_rularid.pdfIn PDF document text
    • http://noxesim.iblogger.org/top_scholarship_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/kedilexele/OhdIiig/aurora_missile_design.pdfIn PDF document text
    • https://cdn.sqhk.co/satijumok/PRMIWjc/66397645355.pdfIn PDF document text
    • https://vimikova.weebly.com/uploads/1/3/1/4/131437612/3906824.pdfIn PDF document text
    • https://cdn.sqhk.co/vefobinibe/4sTiiQI/xumojedi.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/ZsjbghF/live_video_chat_apps_for_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/mogezunir/hghiijh/ragutabepabadeboz.pdfIn PDF document text
    • https://cdn.sqhk.co/zozimevoket/7hjgihj/55414238108.pdfIn PDF document text
    • https://cdn.sqhk.co/rutesawir/cij5Wjh/merrie_melodies_the_early_worm_gets_the_bird.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/calculus_9th_edition_purcell_solutions.pdfIn PDF document text
    • http://podixevobelataw.rf.gd/change_to_jpg_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/91431072690.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/anointing_fall_on_me_song.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/15021892221.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/3mm_aluminium_sheet_perth.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_off0000f3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A4 4780 bytes
SHA-256: 67f05c67ade484e59d5f823cd21da31fecaff6d857570300f1c83f530be222ed
font_01_sfnt_off00010408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10408 11780 bytes
SHA-256: 2e5ea3c54804196e8c9d10596b390cffbb63cf42dafdcd34e751399f8ebeff6b

Open this report in the interactive analyzer, or submit your own file for analysis.