Malicious PDF — malware analysis report

Static analysis result for SHA-256 3545be5b72c3437b…

MALICIOUS

PDF

87.9 KB Created: 2021-03-21 00:12:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0669fab1dc66399b6fbab24dc8d57a4a SHA-1: ea396f3633be90d2d8856653c616bc6ad1e159dd SHA-256: 3545be5b72c3437b46b2bf32398dc8b9c3cec10788ea798865deb3f411873152
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to external, potentially malicious domains, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_URI' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of external links in a PDF is a common tactic for phishing or directing users to exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/award?keyword=historia+del+canal+de+suez+pdf PDF link annotation
    • https://cdn.sqhk.co/fazituku/heplOic/mezevavik.pdfIn PDF document text
    • http://milky-rp.space/570933312064ohux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415304/normal_5fe3ea1a63871.pdfIn PDF document text
    • http://govnosiakxws.online/victsing_shower_speaker_not_turning_onbx549.pdfIn PDF document text
    • http://50offshop.info/284605680302af0g.pdfIn PDF document text
    • https://tafujopebipa.weebly.com/uploads/1/3/0/7/130774972/nafudebeb-lulomugegeno-kowuve.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/i6iadjh/the_wolfpack_brothers_now.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463559/normal_603ec3b119e47.pdfIn PDF document text
    • https://gerasopotegovo.weebly.com/uploads/1/3/4/3/134374655/ketexolorak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390681/normal_5fe293519ec8b.pdfIn PDF document text
    • https://cdn.sqhk.co/tokofape/lPji799/sonic_the_hedgehog_cake_mold.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476952/normal_5fec8329c21b2.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/hgzjdig/weezer_island_in_the_sun_tab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479905/normal_602f35331318f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dazawojob/platinum_physical_science_grade_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abfc240d-df8c-46ab-986d-1d80a06d0896/willy_wonka_and_the_chocolate_factory_full_movie_download_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28fab94f-a90f-490b-bf0b-0567739b88b6/38848780190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c613caa-5c84-4cf8-b56e-a1b07bea1d50/what_are_some_examples_of_newtons_second_law.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/31258175600.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/song_achutam_keshavam_by_ankit_batra.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/how_do_i_know_my_hot_water_heater_is_failing.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1C 5044 bytes
SHA-256: e973add4f29a2d624537829852f2657ee4b794bc3311c5d60af4449b2005d184
font_01_sfnt_off00011b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4E 12144 bytes
SHA-256: 5bdbc337526bcbeb0c1be563acd42ef42a62bedd9292cb4e50ff17a6615b12d5
font_02_sfnt_off00014279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14279 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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