Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1a12297f21ee9a…

MALICIOUS

PDF

102.2 KB Created: 2021-03-19 02:21:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 27777372d0086f403d93c0a226596f84 SHA-1: 1473386b21f2a72eea2367fb4ca2adbb5eed341b SHA-256: 9d1a12297f21ee9adbae3fefe1f207a4d028be9d9fffd390cf76d42c42b53ac3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://dafemum.ru/award?keyword=building+construction+training+report+pdf PDF link annotation
    • http://wopexobow.mywebcommunity.org/52894095915.pdfIn PDF document text
    • http://tidirakozodawon.getenjoyment.net/tabela_de_fios_e_cabos_amperagem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369332/normal_5fcbef540723a.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/bayes_decision_theory.pdfIn PDF document text
    • http://gayerkan.com/do_kitchenaid_mixers_go_on_sale_on_black_fridaydpayg.pdfIn PDF document text
    • http://acgmgroup.ru/92675559217c1mq8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443594/normal_5fc999330dba0.pdfIn PDF document text
    • http://cartest.pro/663959057452ppyd.pdfIn PDF document text
    • http://vofufime.mypressonline.com/how_much_does_a_life_coach_certification_cost.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/68079301639.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/mountain_america_credit_union_promo_code.pdfIn PDF document text
    • http://onlineeshop24.xyz/position_of_adverbs_exercises_with_answers93aav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422386/normal_5fcf7ceb5cec8.pdfIn PDF document text
    • http://instahelpforbusiness.com/dolby_sound_apk_free_downloadtbhy0.pdfIn PDF document text
    • http://zomoxoxuriw.mypressonline.com/super_mario_3d_land_nintendo_switch_release_date.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_bc8d89f604c84410baf40c79c672b142.pdf?index=trueIn PDF document text
    • https://ff743420-c5e2-4527-a456-70ddb2a1abd8.filesusr.com/ugd/5178f2_f9157c56913f4c19a12f0dfc7e32d33e.pdf?index=trueIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_a83a8384f13840fcb615baded8e33c73.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5ff543a-a2d3-4d37-9e52-24b2fc4d33ec/jegoniridaluj.pdfIn PDF document text
    • https://6525eaf8-9a42-4119-9fb4-c3d475b3b78e.filesusr.com/ugd/80bfa9_d0dbb30facbf4e9ab1966d8f23478026.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/24e5b998-9f22-4a2a-996a-d23f0429bf9d/50052918697.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/49811375183.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_off00015279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15279 5372 bytes
SHA-256: dcee90023ab4db980c58d062b8028a10e4ff328878653150bdd0f59dc2fb3928
font_01_sfnt_off000164d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164D6 11280 bytes
SHA-256: ec2cca62b64eb170e429500c9495a2e48c30a6983c1ce190f39753967e88f15c

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