Malicious PDF — malware analysis report

Static analysis result for SHA-256 506ca5e9dc9f9b77…

MALICIOUS

PDF

76.9 KB Created: 2021-03-25 12:11:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 55971906137a146dc711aab9d1e68da1 SHA-1: 1173ac8114993a2b9193cfbce96e67bfda314b60 SHA-256: 506ca5e9dc9f9b77c47108f6ba33f51b6a4ee483034a7621354090979611b059
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and identified as a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely attempting to redirect users to malicious sites.

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://gimoguvi.ru/strik?utm_term=samsung+clp-325w+printer PDF link annotation
    • https://bagawilikazukir.weebly.com/uploads/1/3/1/0/131070307/tudopapebev.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/biosensors_and_biochips.pdfIn PDF document text
    • https://naduvita.weebly.com/uploads/1/3/5/9/135973463/7876138.pdfIn PDF document text
    • http://linodogeb.scienceontheweb.net/what_to_bring_for_nys_road_test.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451940/normal_5ff87d31a49bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477409/normal_605be0210542a.pdfIn PDF document text
    • http://retamos.mygamesonline.org/82804437444.pdfIn PDF document text
    • https://gafepodaxo.weebly.com/uploads/1/3/4/6/134606739/7187311.pdfIn PDF document text
    • https://dezilitew.weebly.com/uploads/1/3/4/7/134728488/wolubujikuzezage.pdfIn PDF document text
    • http://fuwonetuj.22web.org/kuzapuxidaligopir.pdfIn PDF document text
    • http://wigobike.sportsontheweb.net/fivukawoporesalopifoxugo.pdfIn PDF document text
    • https://butevexonukuzi.weebly.com/uploads/1/3/2/6/132681970/f1eefb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rosajeku.myartsonline.com/dark_souls_3_save_file_download_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/strongs_concordance_808.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/3023580706.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/13804069096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d5f280f-1817-4f41-b5c2-58741891ce1c/44641618361.pdfIn PDF document text
    • http://suxosimuji.epizy.com/78943463755.pdfIn PDF document text
    • http://junopufobapepax.rf.gd/what_percentage_of_cocoa_is_in_milk_chocolate.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/iso_22000_haccp_gmp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4459ae0-83d5-4d4d-a91f-962d1d583cbc/42326796607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1057c712-043f-4797-8195-78c429cab811/star_trek_discovery_season_3_episode_9_release_date_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/84078873030.pdfIn PDF document text
    • http://xogowiv.epizy.com/62004452962.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ac6d296-9378-48f9-9662-9c5245e6c200/30895951374.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_off0000ec25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC25 5900 bytes
SHA-256: 684d1c3a31802c69a287d5c6b5ded6f423541001190f437c1924b4a492af349a
font_01_sfnt_off00010045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10045 11196 bytes
SHA-256: 6d2e96e44d08bd0de0518ac14fb70d44f4348faac429af462f8546a7060a7ce9

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