Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ff2c734ea493fc…

MALICIOUS

PDF

84.8 KB Created: 2021-04-26 17:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2cb5b8bdd1743e366a0c524ca7fd4d63 SHA-1: df5b3957c98edcd7e1f8c8663c8f2fcb9bdeda83 SHA-256: d3ff2c734ea493fc9964c056419001017113bab12d3d14afa0e026f6d609f6dd
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 0.9991

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://jumiwimov.ru/strik?utm_term=how+can+i+track+my+girlfriend+text+messages PDF link annotation
    • https://gimiduti.weebly.com/uploads/1/3/4/7/134711596/gubit.pdfIn PDF document text
    • http://itasda.online/lamajivijebalarejilivrsvw.pdfIn PDF document text
    • https://libigidibejaxa.weebly.com/uploads/1/3/3/9/133997225/637cb3cb941fa.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/foot_and_ankle_strengthening_exercises.pdfIn PDF document text
    • https://jazitilifa.weebly.com/uploads/1/3/1/4/131414561/sarunupeponeziva.pdfIn PDF document text
    • http://tanolugulutewu.medianewsonline.com/life_and_death_twilight_free.pdfIn PDF document text
    • http://copalofa.site/358999781317qm9a.pdfIn PDF document text
    • http://roman-holidays.shop/495317376775c7z3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_603510a591c02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382631/normal_6013b460ec444.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379837/normal_5ffc037f817d6.pdfIn PDF document text
    • https://zowobisa.weebly.com/uploads/1/3/5/3/135313501/9886681.pdfIn PDF document text
    • http://legko.travel/28383656797iq62f.pdfIn PDF document text
    • http://sovolox.getenjoyment.net/james_w_newman_release_your_brakes.pdfIn PDF document text
    • http://vivadoctor.ru/bedigebowaselizojunupugi1i8tm.pdfIn PDF document text
    • https://sewizafisebe.weebly.com/uploads/1/3/1/4/131437566/9834981.pdfIn PDF document text
    • http://help-nanny.site/word_collect_level_250_answers5su13.pdfIn PDF document text
    • http://repair-planshetov.ru/bbc_iplayer_android_failedfe261.pdfIn PDF document text
    • http://itali-big.space/713458901308dk4r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bevowamudad.epizy.com/arc_length_problems.pdfIn PDF document text
    • http://xiwularofevomu.epizy.com/62410573919.pdfIn PDF document text
    • http://zaragodevin.rf.gd/adventist_hymnal_download.pdfIn PDF document text
    • http://xipanizi.myartsonline.com/the_question_behind_the_question_download.pdfIn PDF document text
    • http://watenumedar.rf.gd/55690196214.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_off00010c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0E 5628 bytes
SHA-256: 723a4ee62252f4e851e2930e813ca7a820ab99579d6cab84835e886d030ffbf4
font_01_sfnt_off00011f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F48 11068 bytes
SHA-256: 73a4232f5c8afa0541b803f37208d1bcb65befeea2542ac81518cfe5af0d4a38

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