Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb92f725f6e6267…

MALICIOUS

PDF

70.6 KB Created: 2021-02-24 09:01:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e6591b021231d5b2c2c0b6fbdb8d3cbc SHA-1: 097321d53cff2239d7b4428cfef37e92f0b4e246 SHA-256: 1fb92f725f6e62671c648088132ea80bbb486f3a071ff2effbfdcce5595a21a1
196 Risk Score

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://bologen.ru/123?utm_term=how+to+change+language+on+tws+i7 PDF link annotation
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/0a33e6501658.pdfIn PDF document text
    • http://wersita.space/lukamenujimelelonimuja429.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405641/normal_5fed9fed310a0.pdfIn PDF document text
    • http://getfreecreditreport.info/lesco_50lb_push_spreader_settingsxa81b.pdfIn PDF document text
    • https://vakilonote.weebly.com/uploads/1/3/1/3/131382032/pegozuvudoxewotimuje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475863/normal_5fcc54df17203.pdfIn PDF document text
    • http://sethel.xyz/pokemon_quest_evolution_chartqjutg.pdfIn PDF document text
    • http://kilobowomix.22web.org/58225318319.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/makumapikeze/candy_crush_apk_pc.pdfIn PDF document text
    • http://naluvexuwemajub.rf.gd/11139552265.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/97942920438.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/niloju.pdfIn PDF document text
    • http://mutifesojare.epizy.com/parurumidu.pdfIn PDF document text
    • http://vakakumiwizexoj.epizy.com/64312949603.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/pazitetetewewimobexujo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A7 5100 bytes
SHA-256: 7cac544b2637cc77a1becae13e7ee0fa6e646b1fb552504bd942f529191f0393
font_01_sfnt_off0000e91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91F 10656 bytes
SHA-256: 25b7fd9935587e5b39225988e8f2b00584b32811ab3baa77f190d9f2bb5c323f