Malicious PDF — malware analysis report

Static analysis result for SHA-256 78945fdd5384a08b…

MALICIOUS

PDF

70.9 KB Created: 2021-02-25 16:03:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0347654fd72485630f88c60997991968 SHA-1: 4d2843ff18804be31674e608e7571e9791aaf7cf SHA-256: 78945fdd5384a08b53b592aa1620db40669c6c71a577d9b7e203f1a7f3da66db
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file exhibits characteristics of a credential phishing campaign, impersonating Amazon to lure victims. It contains a mass of external links, many pointing to Weebly subdomains, suggesting a link farm or redirection infrastructure. The presence of ClamAV detection and ML classification strongly indicates malicious intent, likely to exploit vulnerabilities or deliver further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zurudepovog.weebly.com/uploads/1/3/1/4/131438860/xanedew-tomopubuten.pdf.
  • 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://jacksth.ru/wix?keyword=greek+mythology+study+guide+answer+key PDF link annotation
    • https://zurudepovog.weebly.com/uploads/1/3/1/4/131438860/xanedew-tomopubuten.pdfIn PDF document text
    • https://lotojenamiz.weebly.com/uploads/1/3/1/3/131381761/2171092.pdfIn PDF document text
    • https://fixefukazadutux.weebly.com/uploads/1/3/1/6/131607703/43ae8b07cde1be.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/jjhdhjp/jesus_cross_wallpaper_download.pdfIn PDF document text
    • https://xusalifur.weebly.com/uploads/1/3/4/1/134131705/bovilut.pdfIn PDF document text
    • http://monubaz.iblogger.org/gowaxaxik.pdfIn PDF document text
    • http://funapuz.iblogger.org/rufimo.pdfIn PDF document text
    • https://wimiwimevodozaz.weebly.com/uploads/1/3/0/8/130874111/165c876.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/pakajujoxixezogupala.pdfIn PDF document text
    • https://kunubixofatefif.weebly.com/uploads/1/3/4/0/134096788/kabegamifet_rizasorevuludak_pitipigu.pdfIn PDF document text
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/70fdfdec156aa7.pdfIn PDF document text
    • https://cdn.sqhk.co/lixozimiz/idjhgic/viral_how_many_views.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/wd_my_cloud_ex2_firmware_update.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/voxijimamunijoga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/gumoxenu.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/15990099645.pdfIn PDF document text
    • http://lupipabibokaf.rf.gd/54566832065.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/chitrali_songs_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/flannel_sheets_at_target.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/invoice_template_payment_terms.pdfIn PDF document text
    • http://fanevisexika.epizy.com/gathering_storm_new_civs.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_off0000d9f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F1 5528 bytes
SHA-256: 966f850d4eaa594126aac8a1d5d7324ec98286f14c87b9555fffbd1554656c05
font_01_sfnt_off0000ecaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAF 9684 bytes
SHA-256: d351b59b845b7d3646b56e94e0cbb37db5f53ff45a348357ffc686b59b252b8b

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