Malicious PDF — malware analysis report

Static analysis result for SHA-256 441e88e85132901c…

MALICIOUS

PDF

93.8 KB Created: 2021-03-22 06:05:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 13ed63d2407c56382138ab1f0855c50d SHA-1: 06c1ae5c3c6579e38acb5a1aea1141de87730b62 SHA-256: 441e88e85132901cddd31a5d4785a486e5f84fc1fc63681f0c8fabfaf53e9163
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the presence of numerous URLs points to an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://jumiwimov.ru/wix?keyword=necromancer+spellslinger+poe PDF link annotation
    • http://nemugub.mywebcommunity.org/nikon_coolpix_p610_price_in_bangladesh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411686/normal_5fcd4181bffe2.pdfIn PDF document text
    • https://mesakejaj.weebly.com/uploads/1/3/4/7/134754162/5a74d647bd265c.pdfIn PDF document text
    • http://rawitotizoxuk.scienceontheweb.net/map_of_baguio_city.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490725/normal_605193c9b774e.pdfIn PDF document text
    • http://zoxodur.sportsontheweb.net/bcbs_prior_authorization_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415300/normal_5feb22293eb13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404984/normal_5fda468938fab.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/6d931fc68.pdfIn PDF document text
    • https://dalujukonuxuda.weebly.com/uploads/1/3/1/1/131163933/xopesi_sarodubaxab.pdfIn PDF document text
    • https://jikabokuw.weebly.com/uploads/1/3/4/6/134658058/gofededifufezanop.pdfIn PDF document text
    • http://nowatora.22web.org/dofilenuzigijigasiba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4531626/normal_60165f2edbc64.pdfIn PDF document text
    • http://jawixogu.mygamesonline.org/de_que_se_trata_la_obra_iliada.pdfIn PDF document text
    • https://kuruxeronujupo.weebly.com/uploads/1/3/4/4/134477992/79e6b043f6.pdfIn PDF document text
    • http://ruwosiju.getenjoyment.net/jibirixakalokin.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://677f84e8-2a3b-482a-8721-58d714100356.filesusr.com/ugd/086aec_43cdcf4196f2425da356e4773e354a68.pdf?index=trueIn PDF document text
    • http://tezezilomaxa.epizy.com/66031671663.pdfIn PDF document text
    • https://cd8fad78-6a19-43c6-878c-830d169ee42d.filesusr.com/ugd/ff0d91_94f5c53dd82348b99329f5775ca12aaf.pdf?index=trueIn PDF document text
    • https://a4758657-6aaa-4003-b0f6-1957e800abfd.filesusr.com/ugd/70c1f8_5f43ce10d4b944f5bef87237d705e1bd.pdf?index=trueIn PDF document text
    • http://liraperuwuw.atwebpages.com/dufiler.pdfIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_4a3e2e366b744086aaba65e738baeb40.pdf?index=trueIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_929b93d2c8794deaaaf8dda641726b15.pdf?index=trueIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/manorama_malayalam_calendar_2020_free_download.pdfIn PDF document text
    • http://zikinevubebera.epizy.com/97799380970.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_off0001247c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247C 4928 bytes
SHA-256: b15211ba0aaa1692a1839fc0309ccdc91249d5472323433194bb0dde01d32099
font_01_sfnt_off00013510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13510 11148 bytes
SHA-256: 00e00f5da3c5421fbb4763eace295d52206399e739ab2867f63e54d2c9da20a5
font_02_sfnt_off00015af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AF8 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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