Malicious PDF — malware analysis report

Static analysis result for SHA-256 163657a1c1c642de…

MALICIOUS

PDF

78.9 KB Created: 2021-03-06 05:33:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f160f6a173e0a0a1029170cc766781b7 SHA-1: b60ae327538aba9ea3ffa3e8dec1a5a8d5288ed1 SHA-256: 163657a1c1c642de97b0f5fcbba48990f32a7a29453efadc9e2b25967de672d0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent. The primary IOC is the initial URL which likely leads to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jottigo.ru/123?utm_term=all+my+sons+moving+lake+dallas PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381551/normal_5fd30b826e43c.pdfIn PDF document text
    • https://sanegirorasatu.weebly.com/uploads/1/3/5/4/135400744/fubipotudupage.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478127/normal_5fc5cd1b42839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408188/normal_601dbd362226e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405437/normal_5fd7eadcdae43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491152/normal_6021f8211dc08.pdfIn PDF document text
    • https://wobakasufafe.weebly.com/uploads/1/3/2/6/132682589/2893b06e7ce1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380411/normal_5ff9c12c8f80e.pdfIn PDF document text
    • https://wokulenazaxur.weebly.com/uploads/1/3/4/7/134744474/bepimuzope.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490132/normal_601407690a0fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375075/normal_5fed4946df068.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac5416ed-2928-4a48-b527-29bc9b84e4ab/47808135852.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/internationalization_of_higher_education_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/082f3ef5-e629-4c34-8d36-ef0a1d6b0915/adeptus_titanicus_the_horus_heresy_gameplay.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/erc_cpr_guidelines_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/camilo_sesto_discografia.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/platform_synonym_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/110015cf-164d-4cd5-9dc9-9452607e69ba/how_to_change_resmed_cpap_filter.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_off0000f72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72B 5264 bytes
SHA-256: eab01ad02752d233b41a2084d29349ee85db8d7ddd785e483b2230562b213fb6
font_01_sfnt_off00010916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10916 10984 bytes
SHA-256: 782342b4b6a429be79ee96d95099731897b4e1333c124fff45ba701646c1f226

Open this report in the interactive analyzer, or submit your own file for analysis.