Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfc68f62f68b1ec5…

MALICIOUS

PDF

85.1 KB Created: 2021-09-09 11:38:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 868ed08499bd79cf33117fc41ed73909 SHA-1: 1542261aaa36e55097475f237d826e8ee92e65e2 SHA-256: cfc68f62f68b1ec5b6b458ef1ef1dc35cff3a32ee4878e69e86f41ccae8d3ab7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the presence of PDF-specific malicious indicators and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9635

Heuristics 5

  • 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 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 http://horizonpestservices.com/userfile/84192785510.pdf In PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16136effa9f1bb---pujadizanuv.pdfIn PDF document text
    • https://snf.styleguides.ch/userfiles/files/24853441218.pdfIn PDF document text
    • http://hocomesun.com/upload/zoveparajamelofijopi.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/32911530113.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/67559914591.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/52332567626.pdfIn PDF document text
    • https://quangcaowebsitecomvn.xemlaco.com/uploads/files/wevoviwoxufug.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/12187769290.pdfIn PDF document text
    • http://gizmakina.com/depo/sayfaresim/file/jifirimarikixikunegiz.pdfIn PDF document text
    • http://www.moyekolodin.com/files/zazoma.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/piduweterula.pdfIn PDF document text
    • https://villadelauca.com/userfiles/file/76044081308.pdfIn PDF document text
    • http://hyundai-baoloc.com/luutru/files/71599158061.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/90058058755.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/81114019433.pdfIn PDF document text
    • http://pp-aqua.com/userfiles/files/97734374497.pdfIn PDF document text
    • http://jamxmpharmatech.com/upload/files/wozodadifizodinutuvigu.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/fuxetolowugivilodenuxa.pdfIn PDF document text
    • https://gdaniec.com/upload/files/ruxozatunu.pdfIn PDF document text
    • https://bnovum.hu/downloads/209010364.pdfIn PDF document text
    • https://polytex.de/sites/default/files/85298937084.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/fosipakekur.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog/file/verigutebavudusupag.pdfIn PDF document text
    • https://konchris.com/userfiles/file/1630584712.pdfIn PDF document text
    • http://shimamura-mail-order.com/userfiles/file/rusujojodabamareralonura.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=groovepad+beat+maker+apkPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC44A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC61 10480 bytes
SHA-256: 36d305392a6e187bba2ca2c7ce889f68336d241a00e05279c05b3f09beed21d8
font_02_sfnt_off0000f401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF401 16380 bytes
SHA-256: e62cca045312918b292d130d6dbdb9eee357ae8462ef5226f02e869bf229e283
font_03_sfnt_off00010a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A95 19596 bytes
SHA-256: 7db9447fc744803f53be3a4868af0b25eb0610ae588775e3e0ca49a01e3b4c33
font_04_sfnt_off00013d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D49 1820 bytes
SHA-256: ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c