Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae270b7d52e5a94…

MALICIOUS

PDF

81.6 KB Created: 2021-03-16 21:22:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 14ac149d37c46403d7a302af818ad2ae SHA-1: 223c6819a39aeaa623a8457c0ca8d28abbbe404e SHA-256: 7ae270b7d52e5a9465b9c35842c5fc772bbc791daca6caa6b5b1684f0e701512
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDFs designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://dugedepap.ru/strik?utm_term=acromioclavicular+joint+separation+rehabilitation+exercises PDF link annotation
    • http://copyright-help-report.com/frigidaire_professional_refrigerator_ice_maker_troubleshooting6rlci.pdfIn PDF document text
    • https://cdn.sqhk.co/lonubugogere/hhgiqgh/69191923126.pdfIn PDF document text
    • https://gonotelavekufuf.weebly.com/uploads/1/3/4/6/134615299/7257536.pdfIn PDF document text
    • http://8bitbeardsco.com/top_interior_design_colleges_in_usa5bp6b.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/motorola_police_radios_for_sale.pdfIn PDF document text
    • https://dosijikapok.weebly.com/uploads/1/3/2/6/132682778/muxipelebizeluk.pdfIn PDF document text
    • http://mekapidi.medianewsonline.com/32300964462.pdfIn PDF document text
    • http://natural-shop.info/6362318325y8q3c.pdfIn PDF document text
    • https://mizemajawoxulu.weebly.com/uploads/1/3/1/4/131437858/62b9246f21e66.pdfIn PDF document text
    • https://cdn.sqhk.co/pesamelez/G1UhhhV/14647860247.pdfIn PDF document text
    • https://sopaxibifezubin.weebly.com/uploads/1/3/4/6/134608036/jemumi.pdfIn PDF document text
    • http://digitalliteracyinstitute.com/xabofisekilefivuwumaw0tmt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://naburonip.myartsonline.com/2196109651.pdfIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_5630429bbe994df89b0799cc0c69f351.pdf?index=trueIn PDF document text
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_8e27815a54464286a86f5e28b9d4e8e4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mujesogi/fobojigofonipib.pdfIn PDF document text
    • https://ced6af22-cf5f-4df0-9cd6-2d424634d287.filesusr.com/ugd/3eed2b_5c732b06d5314df0ad884200b994f491.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/75413108236.pdfIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_5ed7ab73a024477ca0c979d0d9454087.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/dibogut.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/ffxiv_summoner_job_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/35850528602.pdfIn PDF document text
    • https://38f9ccf9-db33-4582-994d-0ea518e52d38.filesusr.com/ugd/368de4_c33f868172ed4853b4ad2c765a1e6733.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFD 5508 bytes
SHA-256: f75ec311fae65bc6c7fece6eb2552a7cb92590cf0ce36be6592cce9f432c20eb
font_01_sfnt_off00011294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11294 11076 bytes
SHA-256: da256620a6e0228e6c3b362729eb84d214fd7e23856d0c5cebb7926bb29ecc39

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