Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae5ae94e7b487bb…

MALICIOUS

PDF

95.6 KB Created: 2021-04-05 05:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e2a45ff53ba01c3f6d2f44c1258b1db3 SHA-1: b64d8e4c46f5ba9d97319bcf47116fd9d18ed615 SHA-256: 6ae5ae94e7b487bbe9e114870112c9031ef24cd8e7cfa91c215b33f5edb911d2
236 Risk Score

Malware Insights

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

This PDF contains numerous external links, many of which are part of an SEO link farm designed to redirect users to suspicious domains. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SUSPICIOUS_LINK_LURE' indicate a phishing or malicious download lure. The presence of embedded URLs and the ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://nipisod.ru/strik?utm_term=how+to+write+a+synthesis+outline PDF link annotation
    • https://cdn.sqhk.co/rejiwosujupa/7ChjxCs/lucky_dube_songs_download_mp3_free.pdfIn PDF document text
    • https://cdn.sqhk.co/jepogedofuz/MdifJge/14625476820.pdfIn PDF document text
    • https://bimozasobo.weebly.com/uploads/1/3/1/3/131398313/xugodafuxag_sezopupodekafu_paxositita.pdfIn PDF document text
    • http://managerprogram.live/converse_golf_le_fleur_size_guideswp63.pdfIn PDF document text
    • https://mevavenepid.weebly.com/uploads/1/3/1/6/131637679/nulazami.pdfIn PDF document text
    • http://kefets.xyz/arthur_miller_all_my_sons_synopsis3rodu.pdfIn PDF document text
    • https://cdn.sqhk.co/fefowofuk/hjXjdid/the_office_quest_chapter_3.pdfIn PDF document text
    • https://cdn.sqhk.co/tanusulirava/chfhi0q/adobe_photoshop_fix_android_4._4._2.pdfIn PDF document text
    • https://jakineporop.weebly.com/uploads/1/3/5/3/135302356/tavaromadamo-pamodapune-bexejigojuneli.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/ghaibij/marshawn_lynch_blocky_football.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/fjck0hg/juvoturezalinupajepobovo.pdfIn PDF document text
    • https://cdn.sqhk.co/tabewinudeka/BtjbcEc/zixebesenifak.pdfIn PDF document text
    • https://vizodejow.weebly.com/uploads/1/3/4/3/134356937/1288839.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/gimisorixosu/samsung_j730f_firmware_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/61451585923.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/how_to_clean_my_cuisinart_coffee_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/18838027361.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/desktop_study_report_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/fawixukixewame.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/dixie_narco_501e.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/creative_writing_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/midland_wr120_review.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/tenant_checkout_form_template.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_off00013af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF6 4928 bytes
SHA-256: 3141edd5e31dea70527687a5c63de3b058093bd26e592439749a32669ae71e78
font_01_sfnt_off00014bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BC2 10880 bytes
SHA-256: 1f6900b5226cdc75c18fd8e4642a68215e373d7bf78f0e2980cb7ce9e7181879