Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2179d64e225f18…

MALICIOUS

PDF

77.5 KB Created: 2021-04-26 23:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3173dbe146b24b7eb02bcc9492c0785b SHA-1: 02c61fab1e0370c090821ff6b0571e1529a4f150 SHA-256: 1a2179d64e225f188c49e7981a7db10159ac95b53388b041883b5569025c0415
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, appears to be a lure related to a "Mckinsey fashion report 2019", directing users to external sites for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://gimoguvi.ru/strik?utm_term=mckinsey+fashion+report+2019 PDF link annotation
    • http://zesegalos.scienceontheweb.net/gagodenogam.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/53528818223.pdfIn PDF document text
    • https://jakugogafezokev.weebly.com/uploads/1/3/1/4/131437362/virezazevikiga-pisabegub.pdfIn PDF document text
    • https://siwepuxerit.weebly.com/uploads/1/3/0/7/130775843/80b82714.pdfIn PDF document text
    • https://nemanuvipiza.weebly.com/uploads/1/3/1/3/131398236/5840337.pdfIn PDF document text
    • https://laxefozono.weebly.com/uploads/1/3/4/3/134361517/bf47188984c2f.pdfIn PDF document text
    • http://limezage.scienceontheweb.net/banwell_spectroscopy_download.pdfIn PDF document text
    • https://bofujobepoj.weebly.com/uploads/1/3/1/1/131164048/sedigupoxudone-kexalal-mabumewonorarog-wonobiven.pdfIn PDF document text
    • http://nutetuxiv.mygamesonline.org/ridafopizaje.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/92972522260.pdfIn PDF document text
    • http://zikewexer.scienceontheweb.net/reading_comprehension_test.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://botalibinizor.rf.gd/62328186147.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/minexoveregax.pdfIn PDF document text
    • http://winixugerefubu.epizy.com/3575445750.pdfIn PDF document text
    • http://padusij.onlinewebshop.net/47899795126.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/97437324586.pdfIn PDF document text
    • http://numumodi.epizy.com/lelufadubafipajotigimuw.pdfIn PDF document text
    • http://tekojexabutixas.epizy.com/possessive_pronouns_examples.pdfIn PDF document text
    • http://lararof.rf.gd/h100n_pulse_oximeter.pdfIn PDF document text
    • http://gajedimigifupet.epizy.com/62976110077.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/welcome_to_bloxburg_beta_free.pdfIn PDF document text
    • http://xizodoja.epizy.com/52876582216.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_off0000f1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D6 5724 bytes
SHA-256: b1801f0fe90d7514c606f0252c14ec08003fd3714b9b090a83c875f80976a036
font_01_sfnt_off00010568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10568 10452 bytes
SHA-256: 1e0631058d5a1e09c005b1d675e7a498fb226e4202a0784ee94a863150d48ea0

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