Malicious PDF — malware analysis report

Static analysis result for SHA-256 63cdfb5a729f0836…

MALICIOUS

PDF

79.2 KB Created: 2021-03-24 17:15:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 49bb4350b165880cb94b5ed1e9805ef3 SHA-1: a94c8f058a1f866a4797eb77d658c115ce8e7254 SHA-256: 63cdfb5a729f083622a5fcd6a87601008ffc998d90b037982d0a6c8ed966d551
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs and is flagged as a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading unwanted software disguised as a PDF reader. No scripts were extracted, but the presence of external URIs points to a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/award?keyword=adobe+pdf+reader+download+free+for+windows+7+64+bit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470028/normal_5fcc5ab8e6a8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387033/normal_605a7018e72ef.pdfIn PDF document text
    • http://goxamid.mypressonline.com/apprendre_a_lire_une_partition.pdfIn PDF document text
    • http://sujurafumub.22web.org/21642546512.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405197/normal_5fd74f00c4933.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_60397e368b5b2.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/nilozinewukawalijehf54b.pdfIn PDF document text
    • http://tefuvawilutir.mypressonline.com/roridokolerewibukuwo.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/lategikup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414336/normal_5ff59375af015.pdfIn PDF document text
    • http://healthyforczechrepublic.site/majavowepatetijisisu71nge.pdfIn PDF document text
    • http://guitar.su/damizumadtb43g.pdfIn PDF document text
    • http://mail-autoscout24.net/80479435709ky7z6.pdfIn PDF document text
    • http://xilenemivagola.mywebcommunity.org/pujajed.pdfIn PDF document text
    • http://biomanua.website/john_denvers_ex_wife_annie8jhnp.pdfIn PDF document text
    • https://sojurepew.weebly.com/uploads/1/3/5/9/135992925/fabon_nexadijazoziw_kajiza.pdfIn PDF document text
    • https://fekoguto.weebly.com/uploads/1/3/4/4/134491689/10a12ea2f88686.pdfIn PDF document text
    • https://marizezibafive.weebly.com/uploads/1/3/4/8/134865590/xapupupad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://benamow.myartsonline.com/jefuvufuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/lowamurepozopegimaliwanif.pdfIn PDF document text
    • http://tezafafowajij.epizy.com/xijaledomoxabewevazur.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/uniformly_accelerated_motion_inclined_plane_lab.pdfIn PDF document text
    • http://memenusaduso.rf.gd/70941395966.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/conundrum_anuj_dhar.pdfIn PDF document text
    • http://gokisubewiti.epizy.com/xiziwepebavag.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_off0000f8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FD 5580 bytes
SHA-256: 73764dd2bbe640714f7e56cddb7c311884e0cd5e8e8ef835589e0a78b76b5785
font_01_sfnt_off00010c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C21 10156 bytes
SHA-256: 4826e989ff6e07a8ef9d0bd072bb6afd4d74df34de2637f9c36e3a6b67047e5a

Open this report in the interactive analyzer, or submit your own file for analysis.