Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f3807f0e0bec1d…

MALICIOUS

PDF

90.3 KB Created: 2021-04-04 17:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 325faee3b00a87a1e75ca3732b003c66 SHA-1: 1270de78d79d275e9d1b35986c1e6890697c909d SHA-256: 95f3807f0e0bec1d1ca7d4b44eb34ef777746a1de89eee84301b5320e316eadb
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 0.9992

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://bologen.ru/aws?utm_term=is+darren+sproles+married PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455672/normal_6006f154a2367.pdfIn PDF document text
    • http://hardcreditcheck.info/how_many_calories_in_a_supersonic_cheeseburgery560l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452161/normal_600b4da9ed737.pdfIn PDF document text
    • http://wspring.space/89345338253zps0g.pdfIn PDF document text
    • http://shtangennstutkupitseychas.xyz/59656839012ta7wy.pdfIn PDF document text
    • http://xamakag.iblogger.org/xiwumidogelava.pdfIn PDF document text
    • https://polujififodujan.weebly.com/uploads/1/3/4/5/134512681/pakorogoxobaluda.pdfIn PDF document text
    • http://gifagudilul.mypressonline.com/define_eclampsia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486221/normal_5fd7de637ff16.pdfIn PDF document text
    • https://toxupuxuforiri.weebly.com/uploads/1/3/5/9/135966975/6263265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488103/normal_6064eb334851a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380090/normal_5fe5b64e90982.pdfIn PDF document text
    • http://emirofficialzm.com/digital_content_plan_template9q8s8.pdfIn PDF document text
    • http://ganedoxumizaj.sportsontheweb.net/1286341285.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483097/normal_5ff380273978d.pdfIn PDF document text
    • http://xemakaze.mywebcommunity.org/20011315449.pdfIn PDF document text
    • https://duwaratax.weebly.com/uploads/1/3/4/6/134621450/vatuvirazanetobudo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416151/normal_5ff9783c2578b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382194/normal_5fc79e0c2ac56.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kadimadifunomox.rf.gd/21354278132.pdfIn PDF document text
    • http://xovigukesejibem.rf.gd/blank_page_print_to.pdfIn PDF document text
    • http://tofilijewok.atwebpages.com/occupational_health_and_safety_act_summary.pdfIn PDF document text
    • http://takerowul.epizy.com/kodibonobajemuxamubo.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_off0001219b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219B 5040 bytes
SHA-256: a90c300c7b22e2e2873e25f7c863f3d6f4380a5d4366c2185d1e8fb6eb2d9d02
font_01_sfnt_off000132a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A6 11484 bytes
SHA-256: b64454654f65177cd3530d112e415e50d7cfaad2b583ae4c6a0fd0b40301a10c

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