Malicious PDF — malware analysis report

Static analysis result for SHA-256 5411b7b53810e362…

MALICIOUS

PDF

100.5 KB Created: 2021-04-11 03:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 925401945283ccb6046e93d71d602d72 SHA-1: 5d4349ac58d3f5dcc10b09c5faf803097f435f3c SHA-256: 5411b7b53810e362173e1f5dd66eef65352162b9334379edf3804c89ef472cdf
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 0.9997

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://ponafet.ru/strik?utm_term=highest+rank+in+special+forces+uk PDF link annotation
    • https://jenamojid.weebly.com/uploads/1/3/1/0/131070605/1433946.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413008/normal_600c93eae6221.pdfIn PDF document text
    • https://timodidub.weebly.com/uploads/1/3/1/3/131379596/zidajubafezutupu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416501/normal_6005f985b7aee.pdfIn PDF document text
    • http://setlyb.online/why_wont_my_trail_camera_take_picturesy9f7w.pdfIn PDF document text
    • https://kitigenuripoduj.weebly.com/uploads/1/3/1/0/131070171/juxuwapetitogiref.pdfIn PDF document text
    • http://techanomic.com/ignou_ma_political_science_books_download_in_hindi3l8zq.pdfIn PDF document text
    • https://puwirobazavuwo.weebly.com/uploads/1/3/1/4/131453501/xojitelawoxuguzoz.pdfIn PDF document text
    • https://fuvekusegubo.weebly.com/uploads/1/3/4/7/134736786/tosanup-joxavofizebik-zinib-dabegane.pdfIn PDF document text
    • http://outputqwvk.space/6185843855cptyw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411228/normal_5ff2932882421.pdfIn PDF document text
    • http://mezajozugabaso.getenjoyment.net/8849632132.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/zafapikilusixip.pdfIn PDF document text
    • http://repiwefubuw.rf.gd/alzheimer_tratamiento_nutricional.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/61800541.pdfIn PDF document text
    • http://womidelere.myartsonline.com/99_names_of_allah_free_download.pdfIn PDF document text
    • http://biranon.rf.gd/gopejeged.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/98263206752.pdfIn PDF document text
    • http://mevekanuz.epizy.com/zobedurujugupazomiv.pdfIn PDF document text
    • http://saxowuwu.rf.gd/tebupizulamolifapevivo.pdfIn PDF document text
    • http://butojoboxorak.epizy.com/90513594213.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E2F 5304 bytes
SHA-256: 93bed56c252e63f2c32ed478979c49b2dda6fa3fbf91da969f9b6723142d0d51
font_01_sfnt_off00016039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16039 10744 bytes
SHA-256: 3687e2b22e3c73dc3d7f982f56615f6ecf0af1ff93cdd9bb8eb8ed2e17ab21d3

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