Malicious PDF — malware analysis report

Static analysis result for SHA-256 930abaa2aad14dcf…

MALICIOUS

PDF

80.4 KB Created: 2021-04-16 00:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 82d3334067c4877ca249a480f3fc9d4b SHA-1: 15940196ee3f65795d3f544fd4a1c567e171347e SHA-256: 930abaa2aad14dcf53a77e81b4354b5f8b0cc24e173b13ee9fd78f2d538e58f5
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://crophysi.ru/strik?utm_term=are+bold+jumping+spiders+dangerous PDF link annotation
    • http://vemelaribox.getenjoyment.net/approximation_questions_download.pdfIn PDF document text
    • http://lnstagram-office.com/jonelanajh5uyk.pdfIn PDF document text
    • http://pavaverijakat.iblogger.org/rapebivirixisujodufut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466662/normal_601ce98d59a7b.pdfIn PDF document text
    • https://cdn.sqhk.co/gujurolekuma/XrRhdii/paradumid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454541/normal_603e7e6992ba5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462982/normal_5ff76f21b8aa7.pdfIn PDF document text
    • http://nesobaka9.xyz/wadaxirelisudikemosmlem.pdfIn PDF document text
    • http://fresh-ita.fun/gangster_wallpaper_girlfz6yr.pdfIn PDF document text
    • https://cdn.sqhk.co/tijonodevi/bhcbWgg/halloween_male_vampire_makeup_ideas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470387/normal_602d946c933e3.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/5odiiMQ/99657159914.pdfIn PDF document text
    • https://cdn.sqhk.co/navozaxezini/chjLJAG/gerabutifox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_0dbf0752335548238ad86160e071404a.pdf?index=trueIn PDF document text
    • http://puwojewemuxa.epizy.com/zijedosev.pdfIn PDF document text
    • https://8a7e94d2-1b07-4399-8a7b-cfebf1eb419e.filesusr.com/ugd/e78b77_a2a245603dac43f68e604777d261c7e1.pdf?index=trueIn PDF document text
    • https://ae8c1479-5121-4009-b0ed-8259dbb1205b.filesusr.com/ugd/0aff45_d5fb4b85a3e940f6b1c7b382443d4c84.pdf?index=trueIn PDF document text
    • http://todidetiped.onlinewebshop.net/illustrated_oxford_dictionary_download.pdfIn PDF document text
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_236cf039bdea4007a1d05cb8ba32b21e.pdf?index=trueIn PDF document text
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_88f8d2ede5b044b3991a710aa3919353.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_off0000fd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD83 5484 bytes
SHA-256: 2ea51fab66827529aec6a461d536ef0fb543f660aca26f2cec5bbddf946a2484
font_01_sfnt_off0001100f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100F 10684 bytes
SHA-256: 18579ee3b4c1211f18ac7d8f970ee4a4dcf2e34c1447565d80d4039e4bdd992f

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