Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d37b828ba8b3067…

MALICIOUS

PDF

72.8 KB Created: 2021-03-25 12:05:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: fda1a1f50f63a17e76edbb008529a091 SHA-1: b1ae115725fc1a5ac6a272dfed4667fa87171699 SHA-256: 0d37b828ba8b3067df4204bdd400b3c7a9b6e6bca9d78c662519ef35aa1f5960
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, with one heuristic specifically flagging it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is https://seumenha.ru/wix?keyword=blue+oak+property+management+chico+ca, which likely serves as a gateway to malicious content or phishing pages. No scripts were extracted from this sample.

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 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.
  • 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://seumenha.ru/wix?keyword=blue+oak+property+management+chico+ca PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4478685/normal_6056cab856166.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366348/normal_5fef3f6a47b4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377912/normal_5fc59fdace4bd.pdfIn PDF document text
    • https://warororob.weebly.com/uploads/1/3/5/3/135314520/zoboborajakusin.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/how_to_change_boot_order_american_megatrendsb6xek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443624/normal_5fffe1b92633d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407818/normal_5ffc9f16496ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384851/normal_60181a8274d3d.pdfIn PDF document text
    • http://passive-income.ru/vonamedifofawer1c6d.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/wanasuvedigo/ziviwibesuve.pdfIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_d402e6781b69466d9d0daeae40863054.pdf?index=trueIn PDF document text
    • https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_c626389764ac48958a1ee3a55f4f49a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/farokof/characteristics_of_informal_sector_employment_in_mafikeng.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/wiwalixewatazokisomow.pdfIn PDF document text
    • https://f414df59-d0c5-412c-8277-160bd92acc6e.filesusr.com/ugd/055bb3_445d180789f840038736166bde16ff74.pdf?index=trueIn PDF document text
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_de7796f02c4f45cc8eccccacaa82c821.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD176 5264 bytes
SHA-256: 04987e133bedf028f49392547fc4a4c3edef669244ced3186f39a3c14aec8bb4
font_01_sfnt_off0000e336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE336 10740 bytes
SHA-256: 2091f04d7443dfc58d1c8a4b35e33dc64bd19ef3603678c1e03bf035f09494a2
font_02_sfnt_off000107c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C0 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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