Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07a2a223c1ce378…

MALICIOUS

PDF

56.7 KB Created: 2020-11-08 20:23:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 83f9be683ec2fd66268a07a528fed3b2 SHA-1: 37efba807f3861da368622abffae3ff6850c8199 SHA-256: e07a2a223c1ce3784788a7934d8be0e3d99064e8e32a4c7f7b34e2b4159e2710
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafficel.ru/aws?keyword=polk+monitor+60+bi-amp PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369323/normal_5f8b5427622a8.pdfIn PDF document text
    • https://jonomivebotuw.weebly.com/uploads/1/3/4/6/134683751/jamagitojenegewav.pdfIn PDF document text
    • https://wubabenababi.weebly.com/uploads/1/3/4/4/134432193/sisotinuzesoketug.pdfIn PDF document text
    • https://towimoni.weebly.com/uploads/1/3/4/3/134340956/zotimo_taxasasofalos_nurefet_volusovuve.pdfIn PDF document text
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/xovefirebe-dikuxepixazo-lovojulobena-perugusopi.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jolon_koxuzozudanik_makilitinami.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://duvipovum.files.wordpress.com/2020/11/bbc_literature_companion_class_9_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10b25cf4-9f69-4db5-be3c-c8dc21ce7f6c/stories_of_ourselves_cambridge.pdfIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/nozemapopumetuve.pdfIn PDF document text
    • https://dobaxululon.files.wordpress.com/2020/11/45241458607.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/15503448003.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/unnamed-file.pdfIn PDF document text
    • https://wazezuf.files.wordpress.com/2020/11/turalizarabinoxavesoj.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_off000085e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E9 5320 bytes
SHA-256: c0a83443c02d8d7078c74fd12afcc84de49bc958cbdad20a99bba78fe0b0e7b2
font_01_sfnt_off000097e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97E1 12120 bytes
SHA-256: f56c5d8e6b70aa79427879d408b9cd0b9b042a76553c25db12a894cb4b9497a8
font_02_sfnt_off0000c128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC128 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550

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