Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa2e0456fcb09de…

MALICIOUS

PDF

117.9 KB Created: 2021-03-23 07:17:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2b2a3dd9aded885cdefbaf4e71c46b8f SHA-1: 9a125099313d423dc21f1af682d856618b675a4f SHA-256: 5fa2e0456fcb09dee35522e93d7a3d242f08e3bb5c5eeb758a7a3b02748a1d3e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for exploitation.

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.
  • 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.
  • 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://pelibifir.ru/strik?utm_term=how+is+time+travel+related+to+physics PDF link annotation
    • https://rofexigu.weebly.com/uploads/1/3/0/7/130738805/kabugodejuzedalewe.pdfIn PDF document text
    • http://molotkov.site/fikih_kedokteran_kontemporer88vl8.pdfIn PDF document text
    • http://dapajurop.mygamesonline.org/ill_be_gone_in_the_dark_hbo_series_trailer.pdfIn PDF document text
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/lokasalatif.pdfIn PDF document text
    • http://sendgrid-de.com/59353988104pqq20.pdfIn PDF document text
    • http://xivixevikid.iblogger.org/97429392965.pdfIn PDF document text
    • https://rofokaragi.weebly.com/uploads/1/3/2/8/132815015/gofagirezitabizupegu.pdfIn PDF document text
    • https://cdn.sqhk.co/jegetito/hbgdNhg/photoshop_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/hbjgfzm/printable_wargame_flags.pdfIn PDF document text
    • https://xexibufit.weebly.com/uploads/1/3/0/7/130739933/pagob_govugofif.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/gidefokenawumivifenoje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_3cdf257d3d7d45dabd44fd72e3e555c7.pdf?index=trueIn PDF document text
    • http://nowutakifotekes.epizy.com/tamil_konar_guide_9th.pdfIn PDF document text
    • http://lebiwubeso.rf.gd/rovapibafe.pdfIn PDF document text
    • http://panafinuniro.epizy.com/nunuvujarepisip.pdfIn PDF document text
    • http://bolirazebaf.myartsonline.com/jozujigotarakomi.pdfIn PDF document text
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_692d8f81b3dd422daea9b5d4ce0aca67.pdf?index=trueIn PDF document text
    • http://dunizolosonon.rf.gd/vemuxibolome.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_off00017209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17209 3736 bytes
SHA-256: c0a0d8c5e123f061efe401d04ba094988fccbf77deee86e7b5aa60938fb1d7db
font_01_sfnt_off00017f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F24 5208 bytes
SHA-256: 170fb76026d24a3cdb0fd2f3d2ee0dc56cd3cdd2b8e0859f5a65b96cf5ebeeeb
font_02_sfnt_off000190f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190F0 14240 bytes
SHA-256: cdb54851e1bd3c40862e768fd9a204b3fec87e8f7d224ba4bf51579ba714065b
font_03_sfnt_off0001bb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB6B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f