Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a62968d6d0a823…

MALICIOUS

PDF

82.5 KB Created: 2021-09-05 06:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2f137dd26a4f4501d655f064678a9de6 SHA-1: fca41fb9be2fdbae47f7ff889e9d16e3cc9be1f3 SHA-256: 67a62968d6d0a823680144e67434cc808bd8842062cc045818006e275b00fbed
164 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites and disposable hosting, suggesting an attempt to distribute malware. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f89f20ef53---totux.pdf
    • http://vladjurnalist.ru/archive/file/boxuvadijisimi.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e04294513a---sozixewogorelefupuwuna.pdf
    • http://dubilex.com/userfiles/files/vubegisijorizurunuxok.pdf
    • http://arohitourandtravels.com/userfiles/file/xojomadurobazugebunafo.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607798c0cf437---sililo.pdf
    • http://swaminarayangm.org/userfiles/file/gerimomitewimefajufimi.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1609bbce5e075f---27482096444.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/uakvd5sdbi5a6rrf5ggmhicra2/30777690972.pdf
    • http://aaaexpressheating.com/userfiles/file/93761981615.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a844bbafea---jivowuresalisamobileruger.pdf
    • http://arredamenticucinesiciliane.it/userfiles/files/48384076149.pdf
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/dfa55259437716e2fd74d864ec38b6df/18147917188.pdf
    • http://reginahajo.hu/_user/file/153735224.pdf
    • https://takarasushimn.com/userfiles/files/sawibewetibeket.pdf
    • http://blfimmobiliare.com/userfiles/files/pojowobavugejumuxuno.pdf
    • https://invest.pl/userfiles/file/35489071725.pdf
    • http://giftboxvietthuy.com/upload/ck/files/mefonaguvatazara.pdf
    • http://arqing.es/ckfinder/userfiles/files/63095322564.pdf
    • http://automozg.by/upload/editor/files/17186998324.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160725a688fc22---40028710245.pdf
    • http://www.clc-engineering.com/siteuploads/editorimg/file/mixurafizigaxuloxef.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608fee46182b1---13241515102.pdf
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160730227b9a85---27207934438.pdf
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/75920752950.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/0c439e4d0b1fba2874ab86c0492ed504/nusidobixemumepiga.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=ctet+question+paper+with+answer+key+2018+pdf+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8f8.bin
075afd58041fc383ea81f53909b135a92b2987e0501ee43dd51e30b5d667b82e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F8 11664 bytes
font_01_sfnt_off0000f4a6.bin
a43ef3b7a904ae740103dc56568d3a14520a55f22609a45679e996bfef0d8931
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A6 18020 bytes
font_02_sfnt_off00012347.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12347 16792 bytes