Malicious PDF — malware analysis report

Static analysis result for SHA-256 a27c03c21353bd00…

MALICIOUS

PDF

86.6 KB Created: 2021-06-29 05:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5caaf6d3ba64d9df6bc75f3039417ece SHA-1: f5a0822c46d7c3b3547a88f37b7b2d0dfc83d67f SHA-256: a27c03c21353bd00e4dba95a993185fed0002fbbdc9990e83d8470a42b660c59
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads, likely intended to lead users to phishing sites or download further malware. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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
  • 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://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/5qbcsgt8rq8e40kcofqkdbbgne/turaninizojafiwud.pdf
    • http://mazdooradda.com/userfiles/file/1708472521.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d27a3d609c---kefexeledaragisubetatijo.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c73c90aa229---sumitarosefi.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/4b329j49hrhtcj5qni58aifhv4/40839695482.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/eh6jnaq4sadcapf60fau5l1gre/57729649727.pdf
    • http://accountingworld.in/singhania/downloads/file/84423652379.pdf
    • http://martonaroniskola.net/userfiles/file/liref.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e1e160aeb---letojufupakizoz.pdf
    • http://kozelskadm.ru/files/uploads/files/vofirojiv.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/rbf3bt6vfmk86f5qduojasl1fj/juwojixixamuxezodub.pdf
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608d427063326---84657204246.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/01c010c56575a3beef8a54987ca4863a/kujevetotakimikoge.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/92419e65526e25419ca4265614230f17/33409569308.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad596ca3213---xofazoruzunizitafakilewaz.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/iqcf3csc6ap1ao4fps443j59ur/veseg.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6a14e7b9c---nonisaverumekoruderaxomaj.pdf
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/jabowofesuxuzejudafu.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a305f4864fb---81622927769.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/d541e10841a5fa17aef3f4789074e8df/47978566139.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac168342b24---bepotulawifikewum.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095aea34d6f6---25240735987.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609379a5f06af---19427140700.pdf
    • http://parfumerieindex.nl/images/uploads/76686097355.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c49baeaae---17528153462.pdf
    • http://mjsolankifoundation.com/fck/imagesfile/vokarotoli.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=fever+without+being+sick
    • 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_off0000f0d4.bin
422f096edad26d979a052194b2ac277462d3067a772afb5ec7e878e410aa61d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D4 16628 bytes
font_01_sfnt_off00011c47.bin
36062ac76572b534b16dcfa03a683358dd4e53821386444a2a8e81a1e82e6b2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C47 10764 bytes
font_02_sfnt_off00013511.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13511 16792 bytes