Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d707877040ce82f…

MALICIOUS

PDF

94.5 KB Created: 2021-09-16 02:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 84080aa24c4e16289c2ad7539e8d7cd4 SHA-1: b62f4884ada2e7b8ac75274d8b510c47fb0b37ef SHA-256: 0d707877040ce82f46230efeff27f0092c31852fcc3f25d018638b837b7eca9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The presence of these URLs and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://krisoc.ru/uplcv?utm_term=demon+slayer+movie+online+eng+sub PDF link annotation
    • http://conomiya.com/images/uploadedimages/file/61423816583.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/bapajapekunaler.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161345ac5d6218---xufulorok.pdfIn PDF document text
    • http://squash-fitness.cz/userfiles/file/34635965776.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/19726161422.pdfIn PDF document text
    • http://madang.eu/f_pds/fck/file/didebapamisatutafor.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/koluvupadodewa.pdfIn PDF document text
    • http://begues.mobi/userfiles/file/kasafo.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16140cea5be044---47143521962.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/wuzejiw.pdfIn PDF document text
    • http://kartinatv.org/uploads/files/54252287026.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/radeneta.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/fuwemosagaki.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/ao0elhe9vtd0fe8gih42bd015j/kenitowe.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/19f91038722f3909c4d357e2737ee493/xukudefakipupos.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/surinuvovagamijo.pdfIn PDF document text
    • https://pastelbuilders.com/userfiles/file/77675080171.pdfIn PDF document text
    • https://simpangkanan.com/contents/files/bimatudapuxufopukuninu.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/41688036335.pdfIn PDF document text
    • http://bckbytow.naszbip.pl/img/upload/files/6057299475.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5b6938686---50743995052.pdfIn PDF document text
    • https://xn--fiqa735be48e.com/upload/files/govijawavigarege.pdfIn PDF document text
    • http://makassitools.com/userfiles/file///64077616864.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/masuxopol.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_off000108ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EE 10772 bytes
SHA-256: 05d2b5812c6e1f0caa52592b7457771b5b5c78a12f4cba4fe5c814c599a9cbb7
font_01_sfnt_off000121b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B8 19252 bytes
SHA-256: 43667cf473ac74645924898bb37d67e67c8cc157625901f491ca68d28f9d45b7
font_02_sfnt_off00015414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15414 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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