Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de6996abcada545…

MALICIOUS

PDF

76.8 KB Created: 2021-04-20 14:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: de89c1fa14c367378b843979e08d00b3 SHA-1: 3639a99e8cad6427a4750bc2e9ce857d30c2aeb1 SHA-256: 5de6996abcada545a9d8717a1f719397044d6c9035533838795bd560d4326b9c
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/strik?utm_term=how+to+light+pilot+on+majestic+gas+fireplace PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4466165/normal_601905fc686a0.pdfIn PDF document text
    • http://sandwichhq.club/585953473650lapr.pdfIn PDF document text
    • http://milano-moda.space/tiwoxedovevigulkrlw5.pdfIn PDF document text
    • https://nifebupamej.weebly.com/uploads/1/3/1/6/131607321/921a3c803fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486778/normal_6038e495ba308.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370525/normal_5fff63bd3cfd0.pdfIn PDF document text
    • http://nofovukad.iblogger.org/algebra_questions_for_grade_7.pdfIn PDF document text
    • https://pimakesoxokozo.weebly.com/uploads/1/3/4/0/134041299/jasuzodijulutoxeki.pdfIn PDF document text
    • http://duduzojezojak.22web.org/insurgent_full_movie_300mb.pdfIn PDF document text
    • http://cardio-natural.info/46re_reman_transmissioneo6yx.pdfIn PDF document text
    • https://jateredadiwez.weebly.com/uploads/1/3/1/6/131606262/vivurefiti.pdfIn PDF document text
    • https://sufifova.weebly.com/uploads/1/3/4/7/134736026/gimagekog.pdfIn PDF document text
    • https://rilitovewub.weebly.com/uploads/1/3/4/0/134095842/gamugujutemiw-lotedenum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421342/normal_60653d5883686.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/59386691576.pdfIn PDF document text
    • https://f1c0478e-57b3-422a-b8eb-433964b677d2.filesusr.com/ugd/16c17d_6004b3595733464696b9bb44200e26ec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/turip/35520794114.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/hashar_movie_song.pdfIn PDF document text
    • http://budakofis.epizy.com/does_the_number_644_mean_anything.pdfIn PDF document text
    • http://baxisewigetas.epizy.com/caged_system_scales.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/california_daycare_citations.pdfIn PDF document text
    • https://f3b86e06-b3aa-4ee1-82f7-79049f3379a8.filesusr.com/ugd/0c4fd2_bceed36e34564fb3aded4c87e2c18175.pdf?index=trueIn PDF document text
    • http://pikuvuluzoribob.epizy.com/kuvunabefidujositatedalu.pdfIn PDF document text
    • https://5c9c3928-af7d-4195-9e43-9647d7263c15.filesusr.com/ugd/508998_b2a08f4b13fe47f185de3a8e4eb475d4.pdf?index=trueIn 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_off0000ec9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9B 5560 bytes
SHA-256: 10647f78125fada904477a90618e548aada5ee4ca01f9be67587b83d8adaf246
font_01_sfnt_off0000ff73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF73 11144 bytes
SHA-256: fcd9eb6a505926be8a916ba4d429296c2a646250145efab021d541707cc8d240

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