Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e6f7f299ad5d15…

MALICIOUS

PDF

74.0 KB Created: 2020-12-19 22:58:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b4d6b875fbf52e36f7d121d02bb73535 SHA-1: 04dffc04ce492c73135617c15a83125363e9f5ef SHA-256: d8e6f7f299ad5d1532c5eee39eb2a53ac26349089843fadb765f286872e8e09d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and numerous URLs suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffine.ru/aws?utm_term=hamilton+beach+bread+maker+recipes+pdf PDF link annotation
    • https://numiduramar.weebly.com/uploads/1/3/4/5/134595515/27b0ba3e2950bc.pdfIn PDF document text
    • https://xapinetevum.weebly.com/uploads/1/3/4/3/134330578/pewezuralaganur.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/wemogabufekatu-xarepevigilo-xinixixapasi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404123/normal_5f9e4f3234cb8.pdfIn PDF document text
    • https://gimelasu.weebly.com/uploads/1/3/4/5/134513778/zorigodiruf.pdfIn PDF document text
    • https://musisemikalig.weebly.com/uploads/1/3/4/6/134694348/6752796.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc77c265426f52a30df419d/t/5fc9e096d7c3040d8733a2d5/1607065750496/last_bigfoot_survival_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6d0c6791da6493f6663f7/t/5fc843d7dcb5b2607975b645/1606960087737/wogerepobebuzanu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dda31452f90b7fe53205/t/5fc5d83a61e25426e10290be/1606801470243/dedotigelawo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce4d65bb7ea8683c97fa18/t/5fd60350c4373837b900c7c3/1607861080663/iba_guidelines_ethics_arbitrators.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd546437a75c289d599510/t/5fdd5db942c0045a33e38ae8/1608342972624/tsurumi_pump_b_series_operation_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67da0c85-0b2c-4af6-b89d-ce27e02589c1/resumen_del_libro_el_conde_de_montecristo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf2bdc7afe470b55578e5/1606218437680/bunozodukadumupibam.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc80e9ff99f865bfec01c9/t/5fdc930717e3a13a9832097a/1608291080186/lewifatovebogasigoropif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/009725b9-fac3-4f00-9cd8-834c1687dced/33781099509.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc77b14579eee3ae06e022d/t/5fcdf41e24c49707d343238b/1607332894890/miraculous_ladybug_season_4_episode_2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28364c89e1c4b8fc8bd46/t/5fcf3c5810aae775716c879f/1607416921438/tiwuzodajanisiwatofuf.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD023 5560 bytes
SHA-256: ebb73bb511ddd349eaf06de5b3ef2719799eeb4b2923fec8a459b733243c4f47
font_01_sfnt_off0000e2d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D6 9952 bytes
SHA-256: 7d9a3af07c17db3ebb1ff0b80a6ff3e7d8f96e25b9599aee146f8a721adcf411
font_02_sfnt_off00010518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10518 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd