Malicious PDF — malware analysis report

Static analysis result for SHA-256 60cda7595e30e734…

MALICIOUS

PDF

80.0 KB Created: 2021-03-16 18:43:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c5cf9dc11c6c0f3e6fd509d4204e68f5 SHA-1: 3eba4f1ccfd9c6b462370cde8c1166782a42ce12 SHA-256: 60cda7595e30e734fe30e344a01f069ba63d4eb9dc0934f16bff6294ba709df2
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. The document functions as a link farm, presenting a lure related to a 'California rental application in Spanish PDF' to encourage users to click on numerous external links. Many of these links point to disposable hosting domains, suggesting an attempt to distribute further malicious content or engage in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/wix?keyword=california+rental+application+in+spanish+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453718/normal_60206d5be645e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445125/normal_60295230ed6ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413374/normal_6017f7f711a77.pdfIn PDF document text
    • http://lnstagramsecurity.net/canonical_form_marriage_catholic_church29vp2.pdfIn PDF document text
    • http://precabinets.xyz/96198334670mdi8l.pdfIn PDF document text
    • http://shimano-stradic.ru/6105798812271dpy.pdfIn PDF document text
    • http://storeplus.pro/xotisawepotezopliasc.pdfIn PDF document text
    • http://smotrikino.fun/commodity_credit_corporation_cares_act5y9k8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467007/normal_601f163da5977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475715/normal_602a18f00bc53.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://07bd7893-a6ec-44d5-90fe-c719e602c0bd.filesusr.com/ugd/aafaff_206ffe3fa8164386856c4c9a444d5ba7.pdf?index=trueIn PDF document text
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_e8325d8228c849a69dd55b8afb614e53.pdf?index=trueIn PDF document text
    • https://0879403c-3be5-48e4-925f-21334a7d5cfe.filesusr.com/ugd/407fcc_3332b0959cae4eff881e1fd7164027e9.pdf?index=trueIn PDF document text
    • https://849cba27-c1c2-4801-a47f-514a08c45c3c.filesusr.com/ugd/7f7a2c_eac3bfc6f3134a4fb8c32d1983700694.pdf?index=trueIn PDF document text
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_1f43ef1a7130455690b5c86d9e009d41.pdf?index=trueIn PDF document text
    • https://eee5dff6-7331-416e-acdf-593d0c386862.filesusr.com/ugd/21e9e0_f7f085a1171f405baff9c03fadc26bc8.pdf?index=trueIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_901bde1514f74c61976f3870c14c3fe7.pdf?index=trueIn PDF document text
    • https://9cfe8934-cc69-4f76-a0d0-2e9849ea4530.filesusr.com/ugd/fd9558_fbe65780788548f7a0d8d01f957d6307.pdf?index=trueIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_18820d97f090484c901fec93a5643a8b.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_off0000eeb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB3 5052 bytes
SHA-256: b0cb2fe5414f7af19d34466fe335d30f7e3381d86cfca180d4d7ccaed5014d90
font_01_sfnt_off0000ffd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD2 10844 bytes
SHA-256: a3b6e8e691e6b0576fcc2778ee73ab248a15f1b1d3c4b9aed55f6b7dfe88de78
font_02_sfnt_off0001245e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2