Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ace423d30bf527a…

MALICIOUS

PDF

78.8 KB Created: 2021-03-17 21:13:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03f0c653c6e56847b3c768bb65ffb5d4 SHA-1: 001f543ab3cda790e51bd9a5257a3ec2216794f8 SHA-256: 7ace423d30bf527a86d95c2cca4690251f954ad134cf6e5a6a0e73ba7c9da1e4
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('soxebez.ru') that is likely part of a phishing campaign. The PDF's structure and embedded links suggest it's designed to redirect users to malicious content, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/123?utm_term=gluttony+crossword+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366044/normal_5ff9603ced806.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_600be7bf5aacf.pdfIn PDF document text
    • http://qqkaxes.xyz/talunabekewusasojursbj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384633/normal_6023d2e521316.pdfIn PDF document text
    • http://remontnatali.ru/zoxuwukogonemavemanuf2a8dp.pdfIn PDF document text
    • http://avlto.best/what_does_it_mean_when_a_guy_says_hes_interested_in_you7rgwg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481408/normal_5fd9110a84fe6.pdfIn PDF document text
    • http://copyrightsupporthelpcenter.com/how_to_use_insulin_pen_needlehsgbu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461211/normal_5ffc237014704.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422640/normal_5ff5427dc9f2c.pdfIn PDF document text
    • http://shtangennstutkupitseychas.xyz/42671580463kbcin.pdfIn PDF document text
    • http://livecopyrightverification.com/zepixutopilipolekm8tdg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_66a8aac464dd4c70bcec39093c1ca2e6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/237c26cf-9bd0-43d9-81f1-ed2d8681eba5/wings_of_fire_comic_book_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d8a9c6b-36b0-4d6c-b81d-6ffbf10e7dd0/98662839155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8739b0c5-a653-458c-8e60-ca24fccaeaec/what_is_the_word_mitosis_mean.pdfIn PDF document text
    • https://df4002df-ed14-466c-b758-10ced248c840.filesusr.com/ugd/3b03e6_e9fa5e0939c04c5b9b2f7adc7db9ae18.pdf?index=trueIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_f97232f3480d4cb09d39e16dcc050551.pdf?index=trueIn PDF document text
    • https://7ec9ed57-df89-401a-953b-45744c150cee.filesusr.com/ugd/6e3131_0d0f23a6c85c49f7a7712ef3da573499.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ba4e41-f41a-49dc-a66a-8c5958f33c55/gukulovufijijogikosul.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_off0000f6eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EB 5160 bytes
SHA-256: 76c734337f5930d0160b37c0a3af90814ab5cfcf8770df0311af18be22f2110b
font_01_sfnt_off000108a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A5 10888 bytes
SHA-256: 4e0542b2a6486e83a1782040b1351fa5a24069c8d1b02e702a19e5e06c39b14f

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