Malicious PDF — malware analysis report

Static analysis result for SHA-256 127a538333cf8206…

MALICIOUS

PDF

84.1 KB Created: 2021-04-06 23:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 60ad7b93051be9ee35a8f83c19d3f831 SHA-1: 091cefb84d56421efb09d15853de8e97ddacb6db SHA-256: 127a538333cf820661fb715b7c6f50cd9b8adcde6a46d8d539808ebbaa479d5d
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 0.9996

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://seumenha.ru/strik?utm_term=which+oral+b+pro+toothbrush+is+best PDF link annotation
    • http://gopidap.scienceontheweb.net/xapadulape.pdfIn PDF document text
    • http://jonotijero.medianewsonline.com/bebixosafolugot.pdfIn PDF document text
    • http://ita-fitness.fun/832910080165cnwb.pdfIn PDF document text
    • https://penaxixix.weebly.com/uploads/1/3/0/8/130813526/e7b80.pdfIn PDF document text
    • http://xikapajami.mypressonline.com/visukega.pdfIn PDF document text
    • http://zerkalo-fugicar.website/abnormal_psychology_case_studies_worksheet2kwxw.pdfIn PDF document text
    • https://buzelobuledu.weebly.com/uploads/1/3/1/3/131397981/mifakomog.pdfIn PDF document text
    • http://uaregroup.com/37896387426rnbky.pdfIn PDF document text
    • http://mejuzuw.scienceontheweb.net/sears_kenmore_central_vacuum_parts.pdfIn PDF document text
    • http://businessoutsourcing.org/wefuwogisamzuxzv.pdfIn PDF document text
    • https://dodilepu.weebly.com/uploads/1/3/4/4/134444379/2944052.pdfIn PDF document text
    • https://roguzemu.weebly.com/uploads/1/3/6/0/136018034/d8ae5984321.pdfIn PDF document text
    • http://xefapase.iblogger.org/72807528164.pdfIn PDF document text
    • http://detonic-ro.website/subagonetivozuzagugybrqf.pdfIn PDF document text
    • https://jamojibo.weebly.com/uploads/1/3/5/3/135349767/e70c3c8a78bf.pdfIn PDF document text
    • https://gunimumatepatu.weebly.com/uploads/1/3/5/3/135313318/jokewomewu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jogirifikisimub.epizy.com/lafexemedutimakedaka.pdfIn PDF document text
    • http://xenuduximowub.epizy.com/padman_movie_with_english_subtitles.pdfIn PDF document text
    • http://vevurikadi.epizy.com/kisipunezimunipus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/754ccf50-da72-45be-83cb-7331808fd872/21575841131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf73138f-5183-445f-bdf0-273daff8af8d/zasalesajorolulirodom.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_off00010884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10884 5176 bytes
SHA-256: e238ee3880bf2dd8c7049d7fb79c5522063e30a41d4a6be3de2bcd72d14881e4
font_01_sfnt_off00011a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A21 12160 bytes
SHA-256: c4ca5d7d5190e2fcfafa53dae38bab55b42de9a5f1247aac970fb23f0eec9cc0

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