Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a7442cc09b3c590…

MALICIOUS

PDF

84.8 KB Created: 2021-09-07 07:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bed13cceeefe0ff87c6181f0ceaf190d SHA-1: 49e71d6bedb7c9ac682ebd9b3f2fe17eb6bf5541 SHA-256: 0a7442cc09b3c590fdab393736e6814b15628d82f76646cc276ea0a53237f9dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to domains that are either compromised or appear to be disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of a link farm suggests an attempt to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://schubert-hh.de/image/file/49086631734.pdf In PDF document text
    • http://autosoftware.company/autoresponders_images/files/89266825075.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/21604973368.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/pabexituleg.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/60465355758.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/mafozofof.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944da77aaff---takidavivuv.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/msrltff0i8497946aei03cmq1f/47598009475.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/92002688855.pdfIn PDF document text
    • https://777mto.com/contents//files/64034880535.pdfIn PDF document text
    • http://budka39.ru/files/11140775232.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/ligim.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/7b1763760a247539f97648db8bb089db/70113634937.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/4b4gamo7ittk04ajsmv99apijc/10307329983.pdfIn PDF document text
    • https://pt2-turbo-j3t.com/contents//files/38378544324.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/77190077491.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/kujibar.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/9c5bc697fe75f261b0b11e5b34f79ce4/sanejowelatimixiwekibune.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076992581122---45570104704.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/boritokavexemukagu.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/35956080671.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d71985ada---92183515896.pdfIn PDF document text
    • https://clic-essc.ch/ck/ckfinder/userfiles/files/45709734786.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b836b51c912---kanenajawadunonewiwenuvu.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16074b30cb18df---geboletupod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=merge+all+files+into+one+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE623 18224 bytes
SHA-256: 1da264469fbe32222a1f657cc12945852082cb82bb3a985ea47fdfcf6a5cf3ec
font_01_sfnt_off00011521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11521 10668 bytes
SHA-256: 3e83be4c555c89e52b2eec30d1ed2826b7e31cea62d20b71adc135491edc571a
font_02_sfnt_off00012d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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