Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b1c405a6f53bc92…

MALICIOUS

PDF

80.9 KB Created: 2021-03-13 16:30:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 361e1efec4e91c31fc7d90bf02b76fbc SHA-1: b0a60d5af62db1ac33240c7ce2d10cea59a4ee02 SHA-256: 8b1c405a6f53bc92f804b2097e10a5c758898f491b241bfd1a9725043a360d35
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of an SEO link farm designed to redirect users to various content, including potentially unwanted software downloads. The primary redirector URL, 'https://soxebez.ru/wix?keyword=apk+hill+climb+racing+2+mod', suggests a lure for software downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wix?keyword=apk+hill+climb+racing+2+mod PDF link annotation
    • https://cdn.sqhk.co/gujuvizaja/jjwzSVt/61813510185.pdfIn PDF document text
    • http://dusibarupuguli.medianewsonline.com/xavuzovemowubu.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/97769982814.pdfIn PDF document text
    • http://mivifukatovaga.getenjoyment.net/14101392059.pdfIn PDF document text
    • https://cdn.sqhk.co/nizekidido/gjcjfe7/69016781391.pdfIn PDF document text
    • https://nevomunetis.weebly.com/uploads/1/3/0/7/130740414/xirawelef-didinezugon.pdfIn PDF document text
    • http://ligugiban.scienceontheweb.net/disujisipobonubeb.pdfIn PDF document text
    • https://boxavukexuzar.weebly.com/uploads/1/3/0/7/130775797/wesuxopu_tobagilufe_pazuwuzam_pariwazixoseto.pdfIn PDF document text
    • http://dalidusiz.mywebcommunity.org/9411372252.pdfIn PDF document text
    • https://cdn.sqhk.co/kelifevaz/FjgjaYj/grand_theft_auto_6_release_date_ps5.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/rekawexuretowo/weed_eater_featherlite_fl20_oil_gas_mixture.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/jasawepukare.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/cam_edilizia.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/92475303031.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/video_editor_for_pc_32_bit.pdfIn PDF document text
    • http://lipeporo.onlinewebshop.net/16773925680.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/4713355917.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/55703017963.pdfIn PDF document text
    • http://bavatesivo.myartsonline.com/possessive_genitive_case_exercises.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15C 5636 bytes
SHA-256: c2fba229e648ab74d4a023c74742411ccb53cf4aee724a7a0981e05b51f14ee7
font_01_sfnt_off0001045b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045B 22908 bytes
SHA-256: df53404be56cceb22f9919db617d9cbbc10520cae135fbebf1a6a2a6f5056cbe

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