Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce7721802d6ef49…

MALICIOUS

PDF

86.6 KB Created: 2021-09-15 18:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 12e218830299891cb386c07195c1a8d7 SHA-1: 06ff49c287f6e7910ddb5e1585371a5b8c0eae5e SHA-256: bce7721802d6ef497157b9af22ce14e8d0d0130ddbeb7a7f46d913bdedd1784f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, a common tactic for phishing or distributing further malware. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://turkeyinsurance.info/images/file/11501371081.pdf In PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/161417504632c6---24253676691.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jemikewifoxesevesetiluf.pdfIn PDF document text
    • http://3qbuy.com/CKEdit/upload/files/jupevaroduzek.pdfIn PDF document text
    • http://safetruck.gr/images/file/fozujiroxirezazajumumi.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/74696782213.pdfIn PDF document text
    • https://mimpiindah2.com/contents/files/febemuvuwewotoxobikozeke.pdfIn PDF document text
    • http://turatabor.hu/media/24225573349.pdfIn PDF document text
    • http://yey.uw52.com/upload/files/2056292185.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/87862848756.pdfIn PDF document text
    • https://safarekhoob.ir/basefile/safarekhoobir/files/65237769872.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/visoradojunitawisoz.pdfIn PDF document text
    • http://studiostocchi.eu/userfiles/files/gezunagavot.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/63105531320.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/84303000820.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/13379991589.pdfIn PDF document text
    • http://mdtrend.hu/files/file/rewarumulupu.pdfIn PDF document text
    • http://gzsjlt.cn/userfiles/file/gimonolasuregadebazerasog.pdfIn PDF document text
    • http://asupuro.com/user_data/image/file/26150873430.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/gurufuzujibe.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac0ed2001e---4251009554.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/40654699710.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/dawejijekurukorudedavi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=bad+ice+cream+2+two+player+gamesPDF 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_off0000ec3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3D 11124 bytes
SHA-256: f2f38511ae55d34072cc57169cb2d6694726efa7a920049d4028abe447adcdc9
font_01_sfnt_off0001062c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062C 17888 bytes
SHA-256: 44185463e4c98697a4545289716faef4943d50e0523aa5ca3c0b74e1f800f52a
font_02_sfnt_off000134a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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