Malicious PDF — malware analysis report

Static analysis result for SHA-256 0207637dc3792661…

MALICIOUS

PDF

123.6 KB Created: 2021-07-09 02:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f16b6df1e49e336eb8743ce34905b653 SHA-1: 3bed3ac868e6727f4d785ac6b9bcdd54e41570f6 SHA-256: 0207637dc3792661dd2137f57811d2fcef002edd6486c83007f940d0f55b29ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9691

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://inwebjor.ru/uplcv?utm_term=d%26d+warlock+pact+weapon PDF link annotation
    • http://szpk.hu/_user/file/37696523263.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f730c6d29a---55066104687.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f5c249267---8900732656.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/duzetesapapeso.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607936c4ddb08---bikideputunigererenubu.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/65385701576.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ogu880ml2eddlqtg5mo81al466/pifevulebikimafubomet.pdfIn PDF document text
    • https://tavio.ru/files/file/21834774481.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/25278084200.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/4ff740945f39785794c111578d50d826/60435664235.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/52f6c09e9d13e4e974fcfae75dc952f5/luwefolobeb.pdfIn PDF document text
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/lemexez.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/butimawuzuxo.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/kinme27mnu7632f5nar48s24mg/bokakakixupeg.pdfIn PDF document text
    • https://mauspro.net/upload/files/sinesejomugewo.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/7eaf0186a0f9743109ddfe7af316017f/wuxawod.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/rupufezelofevojebo.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92a97d5e9---taruw.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb20550178c.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/qftnf93thmvpt2ebfnsdfga926/86943487267.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160b2120339386---84357268253.pdfIn PDF document text
    • https://iaetindia.com/ckfinder/userfiles/files/sedita.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/84533389091.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/pelaninoramenizatufaki.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd0a0b9dc2---89553672612.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000121c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C8 9076 bytes
SHA-256: f695977626623e59fedb2fbedebd468d0acf89ff6f6ceafeb3cee4351ddee6c8
font_01_sfnt_off0001346d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1346D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C7E 16524 bytes
SHA-256: 95c6a76f65060fdcc0ff81f36b6e9bf254fca0fd7171ddb398f3bb76b1187332
font_03_sfnt_off000163b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163B4 1848 bytes
SHA-256: 4bf6fae695098e11d1b110121f1b6459c80d9d34ce7957022d94e47ca10e81b7
font_04_sfnt_off00016c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C4D 58928 bytes
SHA-256: 3385fe64be5526d79e9f54e474dc996726100733f0a7f0c1b116ba54cf740aa6

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