Malicious PDF — malware analysis report

Static analysis result for SHA-256 8760201a0bd562bf…

MALICIOUS

PDF

97.6 KB Created: 2021-07-25 21:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 441ffa7106c8939c6f9a40f8b4d6066a SHA-1: 0bcd12e72bdb7d7afd2cc726086f6c1d0ad1efaf SHA-256: 8760201a0bd562bf603811a55b23028b8223745e5f040f9468a3d93ffd9ff07d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan-like behavior. It contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS upload storage, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The presence of embedded URLs and the nature of the heuristics strongly suggest this file is part of a phishing campaign, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081cf7057f4a---zegumisade.pdf
    • https://bustotoronto.com/userfiles/file/51868370735.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/b1a334a33d12a31fb48648494867026c/27883552926.pdf
    • https://washlounge.in/ckfinder/userfiles/files/88831335617.pdf
    • http://www.pics4us.de/userfiles/file/gamedimuwisawesogakagali.pdf
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/e8875bd4dbd659f33f468a11188d036c/denoneka.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2952bca7f1---vafenadugiv.pdf
    • https://xo-sound.ru/userfiles/file/mirodadiku.pdf
    • http://ehomeforeclosure.org/images/file/xoluzezapibolumax.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb0085a24c3---58313826113.pdf
    • http://shopsuathientu.com/uploads/userfiles/file/lewagewipujadi.pdf
    • http://alphasigmaoverseas.com/userfiles/file/16553225783.pdf
    • http://hiddenroots.org/clients/19739/File/pitesejedesa.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/7e67640209dd735ed348b25fbd17f7fd/jujixutegodeparaxi.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609160d364652---semetogipunalimarap.pdf
    • https://loctra.net/userfiles/file/gakir.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606ea7117dc60---laduzatediwusepogexi.pdf
    • http://dachastyle.com/userfiles/file/wisemorijekusimunolavib.pdf
    • https://zaragozadenoche.es/upload/files/daguwamopitajaw.pdf
    • http://silver1979.com/upload/file/gusefe.pdf
    • http://uro-medical.pl/zdjecia/fotki/file/rubewumog.pdf
    • http://flywings.sk/UserFiles/file/85544420841.pdf
    • https://jxloanchien.com/style/postimage/file/somepobafepopifuwebes.pdf
    • http://vytvarnyobchod.cz/UserFiles/File/jomiwumikuwupebewoke.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/obormrhfkneid753h314ml4aupt69nkp/76720437139.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=how+do+i+check+if+i+have+a+warrant+in+indiana
    • 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_off0001198c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1198C 16792 bytes
font_01_sfnt_off000131a3.bin
213fe7d84c7e08746f56d68af8746f6f7603365528a47142fe6056f68e4ea7cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x131A3 10592 bytes
font_02_sfnt_off000149cb.bin
44d5b641c3112fdd521a6b8117b6635358df1477dd9659e6f2f3e6c2b6940f67
pdf-font-stream PDF embedded font (sfnt) at offset 0x149CB 17324 bytes