Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d6ec2692d1c19b2…

MALICIOUS

PDF

87.1 KB Created: 2021-03-05 22:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: da843b97a075c095c2b85d1350d719d6 SHA-1: 5eaceacd5106edff8c7d623246d38a7acc331cf4 SHA-256: 5d6ec2692d1c19b2faaa8f0dfde88619916de06bb08eacdf9f518abd70a404bd
186 Risk Score

Malware Insights

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

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 0.9997

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.
  • 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://fokemale.ru/wix?keyword=seven+by+seven+rule+powerpoint PDF link annotation
    • http://lnstagramverificationbadge.com/87294859364dyb20.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/lectio_divina_worksheet.pdfIn PDF document text
    • http://girlsbeach.space/dota_2_guide_apke7jtk.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/HwuidwJ/alien_swarm_reactive_drop_mac.pdfIn PDF document text
    • http://ramuwesitavoz.mywebcommunity.org/mufit.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/gadXdgi/video_call_chuck_e_cheese_s_live_online.pdfIn PDF document text
    • https://xikaxuroloxo.weebly.com/uploads/1/3/1/4/131406092/c8c0ff3276b76.pdfIn PDF document text
    • https://cdn.sqhk.co/zanivuwiduvo/EOhjzih/jonuzamu.pdfIn PDF document text
    • https://zusikoxapumobib.weebly.com/uploads/1/3/4/7/134766975/2758921.pdfIn PDF document text
    • http://lnstagramcopyrightmanagement.com/wadamos96hw3.pdfIn PDF document text
    • https://cdn.sqhk.co/boxumiza/jeijgic/61798802821.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/sudutud.pdfIn PDF document text
    • https://mitenipup.weebly.com/uploads/1/3/4/3/134363071/257aa384db092b2.pdfIn PDF document text
    • https://cdn.sqhk.co/sutazojawote/jrhi3ig/50076016728.pdfIn PDF document text
    • http://nesorus.mywebcommunity.org/beatles_songbook_the_rubber_band.pdfIn PDF document text
    • https://cdn.sqhk.co/dulinifijal/dcjdhbs/58533960429.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/ifdQmgj/46107583410.pdfIn PDF document text
    • https://tirusagoxavux.weebly.com/uploads/1/3/5/3/135329940/jupoxi_nutopid_mezibatonivumi.pdfIn PDF document text
    • https://cdn.sqhk.co/xunixenovapi/Qh1Ydgc/19647681908.pdfIn PDF document text
    • https://risovokoxenixe.weebly.com/uploads/1/3/3/9/133997247/kolakolidonifuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duxegejuw.atwebpages.com/syncrowave_200_settings_for_aluminum.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_off00011988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11988 5100 bytes
SHA-256: c3852e93d4074b09b80de080c0bf537b8d3dcc7a73290412d5d0b86d395173b5
font_01_sfnt_off00012b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B07 10564 bytes
SHA-256: fe16953787300f3391dc9e50238bd70b7db1276c77875e671b48609997125ec4

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