Malicious PDF — malware analysis report

Static analysis result for SHA-256 a91e5d30c774a720…

MALICIOUS

PDF

78.8 KB Created: 2021-03-30 07:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: feec3670a4233891591086659386780c SHA-1: dfcf1d32b6d227313743d481d50511dab4d0bc95 SHA-256: a91e5d30c774a7204d5e07ddb82dfca802b94fe04c871df51b4bd392578f631a
166 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, and it exhibits characteristics of an advance-fee scam. The document contains language related to lotteries, prizes, and parcel delivery, aiming to deceive the user. While no scripts were explicitly extracted, the presence of external URIs suggests potential redirection or payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/award?keyword=concurrent+programming+in+java+pdf PDF link annotation
    • http://raxejudesezix.scienceontheweb.net/millennials_meme.pdfIn PDF document text
    • http://towibukawit.22web.org/barcelona_metro_map_2017.pdfIn PDF document text
    • http://tozonofer.iblogger.org/sahih_muslim_sharif_in_urdu_free_download.pdfIn PDF document text
    • http://lafowesezojo.scienceontheweb.net/vagonejevisofejajexopuz.pdfIn PDF document text
    • http://kubosikavudux.mygamesonline.org/bonuzapalawafirapane.pdfIn PDF document text
    • http://kunujunekedi.mygamesonline.org/3771947141.pdfIn PDF document text
    • http://tojuvapemupo.mywebcommunity.org/dogosofanawofojukoxi.pdfIn PDF document text
    • http://sumomubidisuwo.iblogger.org/luxar.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/zokir.pdfIn PDF document text
    • http://difulomutanuv.iblogger.org/25805980031.pdfIn PDF document text
    • http://kapovulup.mywebcommunity.org/12169645284.pdfIn PDF document text
    • http://pisumuvate.sportsontheweb.net/49219231540.pdfIn PDF document text
    • http://zebozewazogaso.scienceontheweb.net/amplificateur_oprationnel_cours.pdfIn PDF document text
    • http://java67.comIfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gokujipavelidaz.rf.gd/14136594125.pdfIn PDF document text
    • http://jofesosozofoso.epizy.com/96152206226.pdfIn PDF document text
    • http://jukasuxoseki.atwebpages.com/anatomie_de_l_abdomen.pdfIn PDF document text
    • http://kafagida.rf.gd/14270278541.pdfIn PDF document text
    • http://vekamodadon.onlinewebshop.net/xitasilod.pdfIn PDF document text
    • http://wudilegabe.epizy.com/misutoxudujaduxi.pdfIn PDF document text
    • http://borinalujid.epizy.com/bunis.pdfIn PDF document text
    • http://wusipoz.rf.gd/35049340778.pdfIn PDF document text
    • http://javarevisited.blogspot.comIn 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_off0000f689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF689 5304 bytes
SHA-256: a11271996fe0bfed7665e61795144027a58c2eefc38049571e2caea3a415bc74
font_01_sfnt_off0001088e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088E 10828 bytes
SHA-256: ff212355a5b70c948686027f7facd5713d8b332e720ac4692f2cc4cc4e291c11