Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b15ea084cb7cab…

MALICIOUS

PDF

99.0 KB Created: 2021-02-17 10:52:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 2f10a538b79c76ccab98560ce81db711 SHA-1: 8e32909ee1f2f8690df71bcbf035f87309863130 SHA-256: 15b15ea084cb7cabeabace5a6a271d10fafbbb73044037c2c00844ddbf1b56fc
264 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is identified as malicious by multiple heuristics and an ML classifier, indicating it is likely a phishing or malware distribution lure. It contains a large number of embedded links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of a lure to enable macros or editing further supports its role as a dropper or phishing document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://crophysi.ru/wb?keyword=m%20audio%20keystation%2088%20advanced%20functions In PDF document text
    • https://fetevosave.weebly.com/uploads/1/3/1/4/131438058/2460596.pdfIn PDF document text
    • https://webesetumisurut.weebly.com/uploads/1/3/4/3/134318687/4f5a8.pdfIn PDF document text
    • https://mesasijodise.weebly.com/uploads/1/3/5/3/135315214/xapevazizapuvodom.pdfIn PDF document text
    • https://zukixuvaxetili.weebly.com/uploads/1/3/5/9/135988851/zutakederigezikera.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/hadQxhh/14914306360.pdfIn PDF document text
    • http://idealica-italiaufficiale.website/gmat_preparation_software_freewt37z.pdfIn PDF document text
    • https://rolafaxamowoti.weebly.com/uploads/1/3/4/9/134903079/riputulibixoberi.pdfIn PDF document text
    • http://dutov.org/dnd_5e_volos_guideoahvj.pdfIn PDF document text
    • http://jirafka.space/5051860839qul6i.pdfIn PDF document text
    • https://bivixogerixud.weebly.com/uploads/1/3/4/4/134469213/892b9f3a8ca4.pdfIn PDF document text
    • http://jopkapopka.online/godijezae4xps.pdfIn PDF document text
    • http://ovca.space/how_to_make_fillable_forms_wordxi474.pdfIn PDF document text
    • https://fitokuzigijot.weebly.com/uploads/1/3/4/6/134681543/genufojotoviz_jezevu.pdfIn PDF document text
    • https://viradigoposexa.weebly.com/uploads/1/3/4/3/134383508/foforoxizajevixur.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/posaxugidut/78057144535.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/44606607702.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/wiley_manuscript_latex_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/95530718202.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11989 9752 bytes
SHA-256: 000b3f15c81d06e69e9c7ab289b4facc65f95850d3fca5c181d96aa542eb53b2
font_01_sfnt_off000139ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139FF 5312 bytes
SHA-256: 42fc937e76dcc5a08e15d10f5a15c3c8ad4b21e8aec7a11d0e3adf4d114b041a
font_02_sfnt_off00014c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C49 16144 bytes
SHA-256: 01d1f1962e530d6b54efe31e04b30f3c5ca2bfbbe5ece5e198450bc7f18aeec8