Malicious PDF — malware analysis report

Static analysis result for SHA-256 59dd500ef26675f2…

MALICIOUS

PDF

123.2 KB Created: 2021-03-10 16:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 67a8fe4e0c1c5274473de3a888fea781 SHA-1: e9ecf0f97b47a6932f722585f8b8e7ad803f78cd SHA-256: 59dd500ef26675f26d65b15fda1f4dcea836dc30be0dd456b0f9643a72d439db
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/strik?utm_term=craftsman+1+hp+12+inch+band+saw+manual PDF link annotation
    • https://juxipibofo.weebly.com/uploads/1/3/5/9/135985723/sekevovojofug-tukuboxig-tunarosome-votovotowen.pdfIn PDF document text
    • http://titoto.xyz/81433746370vmo2i.pdfIn PDF document text
    • https://bojuwidus.weebly.com/uploads/1/3/4/6/134698781/nazejeku-nojakizus-fezixegexum-kixafuzagasapo.pdfIn PDF document text
    • http://prizinsta365.online/rugemyucll.pdfIn PDF document text
    • http://lotto-investclub.com/jofarojalename8xe8u.pdfIn PDF document text
    • http://timecodes.net/how_to_make_shirts_with_printable_vinylfa0pn.pdfIn PDF document text
    • http://fibened.22web.org/syma_x5c_camera_not_working.pdfIn PDF document text
    • http://believes.space/56353870166e05ab.pdfIn PDF document text
    • https://jawuzomave.weebly.com/uploads/1/3/4/6/134660074/4e68727ff303c7.pdfIn PDF document text
    • https://werirubiteda.weebly.com/uploads/1/3/5/9/135972418/vezilasuvewemip_dukowafux_kixaziguzaza.pdfIn PDF document text
    • https://fomujozi.weebly.com/uploads/1/3/4/0/134016754/ronuvulofakujud.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
    • http://wukiramile.rf.gd/simple_past_tense_regular_verbs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94bc862a-3b06-4fbb-8dbc-f0beead0f7c4/levorepejulabexibugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a668de1-6591-4796-9ea3-450d6405cf16/the_main_sources_of_atmospheric_carbon_dioxide.pdfIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_a69d2e177e6b4ccd879a79737f8eef4e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/173046f6-a161-4f65-9673-f677e4c905a0/7_day_mental_diet_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c089458-9814-4e77-83b5-eb4c9c6face8/open_paint_in_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96726dbc-17d1-4512-95b6-77c58f84bc6f/kerosomamavobojofub.pdfIn PDF document text
    • http://xuneviwek.epizy.com/53516067815.pdfIn PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_89c0cdd84ed346e69742825fee164035.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0228121-f4c7-44b4-897a-cc1831f35026/18706475986.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e334ab8b-e0b4-4956-8e3e-ddc26b63ab6f/wuzokewamikiworuxeze.pdfIn PDF document text
    • http://rupadulogoliwid.epizy.com/10893807870.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000176d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176D6 5488 bytes
SHA-256: f6bdf1bc0b60aa3763a49b5f4e9d907b75ce964c0401e03df09ea9bc005466d1
font_01_sfnt_off00018959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18959 12444 bytes
SHA-256: a583ddc2d8bf3b715cfae2f328cecf6db5de5c024e8692669997dd780d5edbe3
font_02_sfnt_off0001b30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B30A 18328 bytes
SHA-256: 42c28210253b203b80cc95079a096b873e2cbe0dd0f6f96391d41c2822a02e89
font_03_sfnt_off0001cf98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF98 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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