Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4b6bed354e73d47…

MALICIOUS

PDF

104.3 KB Created: 2021-03-25 05:03:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fcefeec414fa363871caa0c1a217a3ed SHA-1: d8bf540626e0aec052fe9273d31119be5f93a2d9 SHA-256: a4b6bed354e73d4794446d231a29b6031075a8e9c28d0ffc63a387885a6ab1a6
266 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document impersonates the WhatsApp brand, directing users to click a link that leads to a redirector hosted on weebly.com, likely to download a second-stage payload or phish for credentials. The document also contains multiple external URIs and employs lures common in phishing and tech-support scams, such as QR code scanning and callback requests. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://sagerogokijisoj.weebly.com/uploads/1/3/4/6/134601402/lubogapopiziboz_gomosi_riralemuguwitak.pdf.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://gimoguvi.ru/123?utm_term=jio+store+whatsapp++karne+ke+liye PDF link annotation
    • http://ziwusis.getenjoyment.net/58793544156.pdfIn PDF document text
    • https://sagerogokijisoj.weebly.com/uploads/1/3/4/6/134601402/lubogapopiziboz_gomosi_riralemuguwitak.pdfIn PDF document text
    • http://bagawixaj.mywebcommunity.org/binomial_identities_proof.pdfIn PDF document text
    • https://kezidixujaroko.weebly.com/uploads/1/3/4/0/134040737/92a9916.pdfIn PDF document text
    • https://zexojoru.weebly.com/uploads/1/3/1/4/131409474/65394c72.pdfIn PDF document text
    • http://balegetiwep.mywebcommunity.org/duzunugepobunikawikakuke.pdfIn PDF document text
    • https://viriparerari.weebly.com/uploads/1/3/5/9/135978168/kekujorizadozig_kotir.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/are_playa_bowls_healthy.pdfIn PDF document text
    • https://zademufexek.weebly.com/uploads/1/3/4/7/134765537/viwolaropawubut-kujavadu-zudetow-kugafix.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/33220764667.pdfIn PDF document text
    • http://gukiduwonaxinef.getenjoyment.net/18934646481.pdfIn PDF document text
    • http://gevenukodujojov.getenjoyment.net/89364028937.pdfIn PDF document text
    • http://tujijamutibe.sportsontheweb.net/nuzexi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wewalegomujisos.rf.gd/il_canzoniere_accordi.pdfIn PDF document text
    • http://xifimerin.onlinewebshop.net/vedatofa.pdfIn PDF document text
    • http://jinufezep.epizy.com/jasper_report_table_design.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/kazugipozogog.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/ccie_security_guide.pdfIn PDF document text
    • http://tagijonegularol.myartsonline.com/53334950448.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/brangus_sale_reports.pdfIn PDF document text
    • http://relivoziz.atwebpages.com/tree_of_life_forearm_tattoo.pdfIn PDF document text
    • http://puganuditefi.rf.gd/47835503990.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_off00016175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16175 5152 bytes
SHA-256: 2dc899f9ad6b99934c9899ca993bb64ff94483ae7ee41da3e7ae86896b0cff11
font_01_sfnt_off0001730e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1730E 9720 bytes
SHA-256: 2829eef72c1cc53abce8843b6c87b79619ce4f34ea31f36dbd3746b567956dd2