Malicious PDF — malware analysis report

Static analysis result for SHA-256 107bc2951eb8953c…

MALICIOUS

PDF

70.8 KB Created: 2021-03-01 11:23:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0feaf9d0d6ffedb15c3f6392c4998e8b SHA-1: 308bb425d51109de2fa411d263c9081b9f71a4c2 SHA-256: 107bc2951eb8953c33891e3d455a5983665d1ce64add7f0b49a6e8d61141971f
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/award?keyword=how+to+use+craftsman+82344+autoranging+multimeter PDF link annotation
    • http://xonitaj.mywebcommunity.org/fanararomotu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418013/normal_600ff463eeda3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454965/normal_5fd31415f395a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_6013bbacae425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468534/normal_5fe7d7c7763d5.pdfIn PDF document text
    • https://cdn.sqhk.co/wimedizi/eKvjfOd/74069802454.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/0aS4ihI/62131411938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387704/normal_600c1b43d6cf4.pdfIn PDF document text
    • https://cdn.sqhk.co/rurokusulos/TBhbqhh/stick_man_sword_fight_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485576/normal_60292d025e349.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwetebep/hcdgfjh/ates_ve_su_5_oyna_oyun_kolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410678/normal_602666ada7ea0.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/viromibukoleliw/94197054669.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/73370799239.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/hotel_reservation_format_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/14451100492.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/ratimozuzigavozetuminizij.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/21344134852.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_off0000d429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD429 5832 bytes
SHA-256: 107e90b0dc8df0ff78b991ca2440a94e82b5e84beeda8eb3e3c6bf40d8c75dd7
font_01_sfnt_off0000e803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE803 10384 bytes
SHA-256: 6fa084dfbbb8dc3192bfa7b6b0c0067a19dfc57b57fb46a87e848e448834d391