Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a4a0353fba213c6…

MALICIOUS

PDF

68.5 KB Created: 2021-02-07 02:59:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 1120db65740ef3d80058da9f1bd40fd2 SHA-1: c6ca938bf0f1dfd5192d049a6735fdd1fafa6e50 SHA-256: 8a4a0353fba213c6c64542e148cdc8aa15a9c206add1ab67fae4858916f8ca41
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://baarspo.ru/wb?keyword=emerald%20lake%20weather%20report PDF link annotation
    • https://wepebajaka.weebly.com/uploads/1/3/4/5/134588919/a1c533209f64.pdfIn PDF document text
    • https://sunudufexune.weebly.com/uploads/1/3/0/8/130874439/6cf353b82ff.pdfIn PDF document text
    • https://nupewaxupojiga.weebly.com/uploads/1/3/4/0/134042887/e2ef88.pdfIn PDF document text
    • https://nenawopoweso.weebly.com/uploads/1/3/1/4/131406478/kevinepe.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/O7giqhf/san_andreas_crime_city_3d_apk.pdfIn PDF document text
    • https://xepevuke.weebly.com/uploads/1/3/0/7/130775471/jojojorukefusebekof.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/g9hgljh/39710878073.pdfIn PDF document text
    • https://cdn.sqhk.co/kapidibewomu/74hbBib/taptap_chinese_app_store.pdfIn PDF document text
    • https://muwilumi.weebly.com/uploads/1/3/0/8/130813533/mepowi.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/iaKjcgh/parallel_account_apk_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369920/normal_5ff6168f211f0.pdfIn PDF document text
    • https://cdn.sqhk.co/gunakawujo/fgiignT/tower_heroes_casual_mode.pdfIn PDF document text
    • https://cdn.sqhk.co/mimofeto/hcA3jeu/ladisizobovap.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/ig5hfyy/donkey_kong_game_boy_advance_sp.pdfIn PDF document text
    • https://tusatetop.weebly.com/uploads/1/3/1/4/131408029/dodaximud-sosowuwazevoru-mexilolosigipi-forezepasik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17A 5132 bytes
SHA-256: 7e03179bb3838d4daf92ca697ddcc6d4529fe652490c37c86e636fd9f97ba3db
font_01_sfnt_off0000e2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D1 10252 bytes
SHA-256: a5a64f6fa2933c1619bc0fd55e20c2a17001be88b47d0dbe0811005b1897f659