Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be0fbc3905157b2…

MALICIOUS

PDF

91.2 KB Created: 2021-09-19 01:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8bc87ae662090d35889f2239dd6dc49c SHA-1: 124fb0e28b9f229048daf5983bda66ba5a8f5b3e SHA-256: 1be0fbc3905157b208c4a14fdb48db2c2b028c9cd870162fb0f355d8a4cf9702
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm intended to lure users to external sites. The presence of 'utm_term' parameters in some URLs indicates a potential phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://garglob.ru/uplcv?utm_term=justice+league+free+streaming PDF link annotation
    • https://jakspravnenapsa.cz/userfiles/file/jizasigowuwek.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/30601146624.pdfIn PDF document text
    • http://afslab.asia/upload/files/62836032828.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/kevofona.pdfIn PDF document text
    • http://tartak-monis.pl/tartak/images/file/42511380189.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16144f3fb66c79---61010522312.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/8672207272.pdfIn PDF document text
    • https://interno-kazan.ru/upload/files/94099291379.pdfIn PDF document text
    • http://efrex.cz/files/file/fowidof.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/161389f9a7a7cc---vorinumoxajaba.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wirokutetid.pdfIn PDF document text
    • http://dep14kirov.ru/userfiles/file/27883373248.pdfIn PDF document text
    • http://studiotecnicomaglio.it/userfiles/files/24317216903.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/fezikimanos.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/zejekenaduvakisuzezorisom.pdfIn PDF document text
    • http://dautuck.com/uploads/userfiles/file/5401926589.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16142504e2b801---56758464726.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/15269653350.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/60185a0703283a1a90853c4ea38541c0/72372308539.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/43551876135.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/dirinemofegop.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/biribadixikunivupebunofe.pdfIn PDF document text
    • http://acril.ru/ufiles/files/32910483590.pdfIn PDF document text
    • http://propack-th.com/image/upload/File/31187579218.pdfIn PDF document text
    • http://www.ortodonciaelisafarache.com/ckfinder/userfiles/files/88458466000.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_off0000fa2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2B 10652 bytes
SHA-256: 2a96af550c578f5f74501cab2bc74d793be861b5d55ea8d83c617865e3149a5e
font_01_sfnt_off00011293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11293 20088 bytes
SHA-256: fe5f9e34af2e3c52384c7c5f6a466214e74a3c4facb37f4fc06922afcafe7cf0
font_02_sfnt_off0001472a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1472A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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