Malicious PDF — malware analysis report

Static analysis result for SHA-256 48b1d155299666f6…

MALICIOUS

PDF

83.0 KB Created: 2021-07-02 16:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ab03a258f3a7b6a7e7131c4117970058 SHA-1: fc1305c475ff9e438ab741a83264c0f1be403f8d SHA-256: 48b1d155299666f67134ebe41af470cda50bcb8ff85c5953bd9fdad85e1bb796
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves tricking users into clicking these links, likely leading to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://aquafilling.com/userfiles/file/japowejovofavum.pdf
    • http://lideparts.com/userfiles/file/1623743388.pdf
    • https://prawobrzeze.info/userfiles/file/newegekukejexujefez.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/41350dbbc73580dc19bcafd60cbeecbf/nudezex.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b44ab2c0c2---64235918279.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a04fb474e---2213665179.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/f9740e1849bb2485f0f43f43c471cffc/3573304832.pdf
    • http://starkhigh1972.com/clients/d/dd/dd83d6d7846a033806cdb512e10d7d7c/File/11402089256.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/a870114b711b15f2dae7e28a3b9fec3f/64426035136.pdf
    • http://honda-vo.com/upload/file/gilirusezemug.pdf
    • http://africareview.in/userfiles/file/sedopibip.pdf
    • https://dcimx.com/files/34600440151.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/dbb3be5c7ffbda81da24dc5dd750db7b/lurulepewevumepidu.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774345f0c20---terivopemaxezez.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41c50691a8---bozexumejapiwi.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd28b0edca---xemokoluxeli.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/19a02c0725b2d876fad4bd58d6fdc43d/49605453053.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a215264342d---revomejigugimozojeku.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609080fbb0aae---kutifumigenelonagagabiwap.pdf
    • https://bya-ingenieria.com/ckfinder/userfiles/files/24819885431.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608da5cb6f2a6---wosibasaxegubadaj.pdf
    • http://allycatering.com/userfiles/razogusevi.pdf
    • https://pmeds.us/userfiles/file/gekaviwexutirunukadovukuj.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc67848df2---14294516579.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=present+perfect+and+simple+past+worksheet+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df21.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF21 16792 bytes
font_01_sfnt_off0000f738.bin
b17938a64a54defe2951fec06be43d4dd5a21761fa55924b7804cdf2886e6e64
pdf-font-stream PDF embedded font (sfnt) at offset 0xF738 11064 bytes
font_02_sfnt_off000110da.bin
6cdbed3aea31acfbec08e05863683296658ee7d2bc532413a844f54b3c949080
pdf-font-stream PDF embedded font (sfnt) at offset 0x110DA 16764 bytes