Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe89e5c262c277d1…

MALICIOUS

PDF

75.9 KB Created: 2021-09-09 09:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 172911cc414d21247af1b1a08d2ba9e1 SHA-1: 324b87efc7eeabf609dffce0d712a3c29a3b549b SHA-256: fe89e5c262c277d1209b8dbdcda8c3184e2372365456985f5a7be81a356f0edc
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of a QR code lure heuristic further supports the phishing pretext, aiming to trick users into scanning it with their mobile devices for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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
  • 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://smidgel.ru/uplcv?utm_term=qr+code+reader+not+working+android PDF link annotation
    • https://armature.ir/cache/fck_files/file/vibipatamikaropakuwodu.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161318a9db6e6b---87541531096.pdfIn PDF document text
    • http://hasadtemizlik.com/upload/file/wokotit.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/12462407167.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/vekogarelobipo.pdfIn PDF document text
    • http://eva.am/files/2e4a42481618f425.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161347d58b1549---wujekegexebudo.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/83490e2885a87ef7a49f8f50513ef98f/zufekotek.pdfIn PDF document text
    • http://selidbe-beograd.info/files/61512823916.pdfIn PDF document text
    • https://hoangphatdanang.xetnghiemadndanang.com/uploads/image/files/75505940015.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/9d04f294a5294d6e07a056d268df7115/gefenazoragemixo.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/pizokol.pdfIn PDF document text
    • https://yenicekentkaplicasi.com/userfiles/file/47092684560.pdfIn PDF document text
    • http://gorsilawfirm.com/userfiles/file/89138750028.pdfIn PDF document text
    • http://japhina.com/upload/file/salojizufuzinotimimur.pdfIn PDF document text
    • http://celeb.huh.hu/UserFiles/File/sidawokiweruzunupapi.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/64901205281.pdfIn PDF document text
    • http://interiorsexpress.biz/dayafter/uploadimages/newsimages/file/mofalixetinumamaxuwex.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/xoxijufulunitibotixanirom.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/9d4aadbb0c19697989a78f7108bb1675/dagusizewakapukerapuzif.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/visesasodufibunuxomuxi.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/zepulijejezor.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/f600fd096cb202965a51f976e0b3803f/7242161385.pdfIn PDF document text
    • https://ctapigroup3.com/contents/files/99169033220.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dcf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF3 17400 bytes
SHA-256: 3506b7f8fe6126ca1b98144877db910f7656db9259f9742110d15073467e2ca0
font_02_sfnt_off000109a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A8 10568 bytes
SHA-256: f2a57c2921d0adc13ad22fecde8b9e25ade1a3bbd1c6e557bea3f22bb3345ccb

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