Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aff0cae8015f41c…

MALICIOUS

PDF

72.7 KB Created: 2021-03-09 09:33:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f13f5c33548da3928f433424bfdf4467 SHA-1: e97cfd6fbf04a47f96145260511294230f2428a4 SHA-256: 7aff0cae8015f41c1e507da6213f0b8bd4deda68368fcc665839118bfda13921
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://soxebez.ru/award?keyword=oxford+dictionary+of+difficult+words+pdf PDF link annotation
    • https://pumutetigowon.weebly.com/uploads/1/3/4/6/134699291/9324791.pdfIn PDF document text
    • http://c-advance.space/ramayan_in_hindi_book_online4brfc.pdfIn PDF document text
    • https://pawizujepus.weebly.com/uploads/1/3/1/6/131637171/bowepowusume.pdfIn PDF document text
    • http://leree6.club/rekekamorupancp9nb.pdfIn PDF document text
    • https://wevapagavum.weebly.com/uploads/1/3/4/3/134306171/nanikur.pdfIn PDF document text
    • http://abanca-electronica.com/red_star_over_china_amazonfl0bn.pdfIn PDF document text
    • http://spoonnumberone.xyz/sex_and_the_city_season_1_episode_7_bg_audion6m1b.pdfIn PDF document text
    • http://gayerkan.com/29954769440wtjqr.pdfIn PDF document text
    • https://gererojakomez.weebly.com/uploads/1/3/1/1/131163960/1239956.pdfIn PDF document text
    • http://kirisixifikixon.22web.org/htc_m8_battery_price_in_nigeria.pdfIn PDF document text
    • https://farazekij.weebly.com/uploads/1/3/4/3/134379469/wopurojipomub.pdfIn PDF document text
    • https://ruxosegid.weebly.com/uploads/1/3/4/2/134265817/xalan_xazez_butopofuv.pdfIn PDF document text
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/xedojizojef.pdfIn PDF document text
    • https://suwekamepegatir.weebly.com/uploads/1/3/2/6/132682685/gozaxemujuzovulu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://medemamonolusav.rf.gd/types_of_prophetic_oracles.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/goblin_guide_modern_deck.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/el_cuadrado_bruno_munari.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/google_chrome_apk_android_4._2._2.pdfIn PDF document text
    • http://boxitevu.rf.gd/fimex.pdfIn PDF document text
    • http://kezepinaxozegom.epizy.com/vewitu.pdfIn PDF document text
    • http://goseletew.epizy.com/zulinebofofak.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/bft_rigel_5_manual_english.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_off0000df83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF83 5436 bytes
SHA-256: f761f4f9f7f84255e377923a3dd884e092d193771c255e4ce3d9405c3229018c
font_01_sfnt_off0000f232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF232 10312 bytes
SHA-256: ced90b6c805cafbfa70dd470c50887f9b19b7acd6ab188cbe77a011b09377e1b