Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc199d80f2577cc5…

MALICIOUS

PDF

84.9 KB Created: 2021-09-08 00:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 6d072be9d2e078cf3044fbaf7269dece SHA-1: 380ae79fad0d5b930dde928334fbbe843504ff8b SHA-256: cc199d80f2577cc57b2948d2ef10a29e72c6723751b9d867f87e289138af6f10
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9834

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/23i2v6vr2vm2f3j6ja436s2vea/zoxajatexusilodi.pdf In PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/vsu3sp04a7hd8kh2u5rte351lq/wulagotedukofivunojugol.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/70864834903.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/52896070508.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/7bfc3740e00fa404fdf5ea04db062019/18359272211.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/2669789310.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/boxarugebowumetunoferexik.pdfPDF link annotation
    • https://cecprint.com/images/file/kojusu.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/ee4c9c0c9a5280916bb434228c6f218c/ramaporak.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/70484515239.pdfIn PDF document text
    • http://5percent-design-action.com/upload/users/files/sonararalusutati.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/21642616430429da8ec4044724468555/fomuzigubagegu.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/rojavo.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/288a5d7c81a6a0e3f93933e655d5ab98/tenikagagowez.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6406085eaa---22770605978.pdfIn PDF document text
    • http://mehmetrasimmutlu.com/icerik/file/raxodupa.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607231529e191---tesutonolikupovekiniki.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/44e1825acb7a447088e9ecf0c8a0264d/kivufejuf.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/0c99a5d7f7bcfd203bb8e9e7df990cd7/nerutaninokesiradakafax.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f385eefb1---liponanerujenovelawav.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/rogadanelivejopuwojobibu.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/9611151191.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/dimigoleponabumakekoka.pdfIn PDF document text
    • https://performanshost.com/calisma2/files/uploads/47676211425.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b8b608237---kepiruwomikivuketujij.pdfIn PDF document text
    • http://cloverpark1960.com/clients/1/17/17c242f0968dc4bce059666b43fbd075/File/xabozunesonukosimubofomi.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/96760705803.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=procesador+de+alimentos+manual+ventaPDF link annotation
    • 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_off0000e36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36C 18668 bytes
SHA-256: 87e69550327f1988b2ef8f226714d39520f02d790d0cd87a57c6ccf3f02502f9
font_01_sfnt_off000113db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DB 10696 bytes
SHA-256: 58efa875dfaeb632ac5e580df85c991ab1fa996751e394ba37b085e36171aa3e
font_02_sfnt_off00012c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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