Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcbbfdcb2cee9008…

MALICIOUS

PDF

78.0 KB Created: 2021-03-23 13:15:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c2d7c58541a67920173fb1ac7d417953 SHA-1: 1cb70419abe79326c277ab7fb2bd7454998f21d8 SHA-256: dcbbfdcb2cee9008ef3a6c4fd6c107d5535737b5b92cceb41679de13dca26264
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jacksth.ru/strik?utm_term=cisco+8742hdc+user+manual PDF link annotation
    • http://soguged.22web.org/single_stage_bjt_amplifier.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/2VXgjEC/omg_racing_riders.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/Lmqhdjf/87034904561.pdfIn PDF document text
    • http://levelupguild.com/chittagong_pola_noakhali_maiya_full_moviecn6uy.pdfIn PDF document text
    • http://fazupefejivujuf.iblogger.org/anemia_de_celulas_falciformes_2020.pdfIn PDF document text
    • http://basvuruizleme.online/verizon_fios_gateway_router_manual6zirf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460966/normal_601f35786dec6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414696/normal_5feb1fc4cf384.pdfIn PDF document text
    • http://4gusevshop.website/13890476032w1jtn.pdfIn PDF document text
    • https://xigizimevavas.weebly.com/uploads/1/3/5/9/135982966/sakidojafadowo-pasuzepekumepe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391327/normal_604a4fe4e0a1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368951/normal_5fe5be120fe48.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/ze6jghc/total_launcher_tutorial.pdfIn PDF document text
    • http://airbin.top/glass_walker_tribe_booknf45p.pdfIn PDF document text
    • https://cdn.sqhk.co/legikowe/d0op9le/the_rider_iowa_city_press_citizen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369900/normal_5ff98026e8f51.pdfIn PDF document text
    • http://canlisohbetim.net/tolananizifumelakisakuyhxb.pdfIn PDF document text
    • https://badosajag.weebly.com/uploads/1/3/1/4/131407507/vugipebakuzezamutiva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e942959e-95af-4115-ab05-a6e38533eaad.filesusr.com/ugd/66f7a0_bfc597cf0e2f45c98f54e14e73a8a7c5.pdf?index=trueIn PDF document text
    • https://8dfdba76-182f-4dc4-9dda-37a8c8d09dc9.filesusr.com/ugd/4ae4db_89ec88a092a646cd88618640ffd3dcef.pdf?index=trueIn PDF document text
    • http://tivapatovike.epizy.com/26063460793.pdfIn PDF document text
    • http://josetevuj.epizy.com/80830504419.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_off0000f2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F0 5576 bytes
SHA-256: 84a01faa89b7072ec95df8390ff1df536dee5ccc0f915e6929067d1ece63afc1
font_01_sfnt_off000105c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C3 11100 bytes
SHA-256: 733f1db9eedece30e7c6e2e51009f8845b970d25f64de1ce70174ffb364e41ac

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