Malicious PDF — malware analysis report

Static analysis result for SHA-256 86a1d89f049a4f7a…

MALICIOUS

PDF

68.9 KB Created: 2021-03-16 23:39:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: cb06fdbcf7df8b7f8c67aded4d2cd6ab SHA-1: 0949b02e2747bce9382c6ab62d801349639371db SHA-256: 86a1d89f049a4f7a5d9912b7edf633d3ec1c5e0a5a6faa20c939c3c2779f0641
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm strategy, and the presence of external URIs suggests an attempt to redirect the user to malicious content. While no scripts were explicitly extracted, the overall structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/award?keyword=business+process+outsourcing+pdf+download PDF link annotation
    • https://dapalijika.weebly.com/uploads/1/3/0/7/130738969/e2141c5ee8.pdfIn PDF document text
    • http://sobofikikovir.22web.org/guided_reading_levels_for_parents.pdfIn PDF document text
    • http://winelorasagi.22web.org/moreguvozakad.pdfIn PDF document text
    • https://pifavakibapel.weebly.com/uploads/1/3/0/8/130814246/sodivuzokav.pdfIn PDF document text
    • http://mubalupuzapo.22web.org/automobile_mechanics_by_nk_giri.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/19193912729.pdfIn PDF document text
    • https://soregekewo.weebly.com/uploads/1/3/4/2/134266411/kepavosezolepolexeju.pdfIn PDF document text
    • https://xofiguguja.weebly.com/uploads/1/3/2/7/132710561/ef8ea5.pdfIn PDF document text
    • https://xagixuruzetel.weebly.com/uploads/1/3/4/3/134319769/a70bd71.pdfIn PDF document text
    • https://mumilupoj.weebly.com/uploads/1/3/5/3/135351188/mexenudojav-wepixoxuja.pdfIn PDF document text
    • https://sanijala.weebly.com/uploads/1/3/4/8/134889677/ca8282beb7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tevesuxaxil.rf.gd/80874401162.pdfIn PDF document text
    • http://davofunup.onlinewebshop.net/41982922610.pdfIn PDF document text
    • http://darajakejaxise.rf.gd/fawoxomamitexasojanad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1827bcb7-d805-4203-afea-ee58450c5cb3/fisher-price_sweet_surroundings_monkey_cradle_n_swing_manual.pdfIn PDF document text
    • http://nibijifituvi.epizy.com/tonub.pdfIn PDF document text
    • http://zepamavapero.rf.gd/watikukubelewixadibizos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f053aac-f52e-4ed0-9494-496f885b5ddd/sudawabizuterofinurore.pdfIn PDF document text
    • http://bafuwujix.atwebpages.com/dosoxolusijixapoke.pdfIn PDF document text
    • http://fevoreselo.epizy.com/gopop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4fe83ff-a91b-428a-8192-0ca623a93203/whats_better_cast_iron_or_vinyl_weights.pdfIn PDF document text
    • http://pabotojixupi.atwebpages.com/big_ideas_math_course_3_teacher_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a9809ae-6e7b-4238-8479-43f8837edeaa/lalosudazep.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_off0000d0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E3 5464 bytes
SHA-256: c2b5e1e604cdb027abdc7554ac55dbee7d3e1ddddac5cb3fdfdadc7eaeaf4efd
font_01_sfnt_off0000e39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39D 9996 bytes
SHA-256: 38f4073cd059d50d498a0c0256c8b4440fa34fc1eb13d20c4d53766f37aa907e

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