Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab644607cd14b78e…

MALICIOUS

PDF

75.4 KB Created: 2021-07-01 17:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4070352029ecb21077c7c5e453bb2709 SHA-1: 3805f09c1ef1f7bed54ce6ac5381a06368cc8e70 SHA-256: ab644607cd14b78eeb9dd9b0994dc1e2db81207ce1d4c9ef938eb16b5b56d30e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608e295706b86---garogerowonamuj.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bba87077d25---manifowupevigarivis.pdf
    • https://asthasupermarket.com/userfiles/file/37846399662.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a837740b966---gividuluvitifagijekoxo.pdf
    • https://bandai-k.com/userfiles/file/81012393231.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24043a7711---53372961543.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/d5718b503c1a131c853ffd0cddeffae9/69079859623.pdf
    • http://aapltd.net/userfiles/file/9595970676.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4530b47d50---wopologixijelimul.pdf
    • https://kingcarmotorista.net/uploads/files/lopogujixova.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090dd0ec4975---37791452289.pdf
    • http://alpha-cp.com/userfiles/file/foseviwulalefilu.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3148e363d---tikumojerugetave.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/r0rnkealtsh37ei6ppfkpkonkk/30439818635.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4bdbe949d---siwiradesoj.pdf
    • http://fotografoenricogiampieri.it/userfiles/files/jojunererikisev.pdf
    • https://aronabritcan.com/userfiles/file/pajexagomulejod.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/23e87e36a0101fcc1497271bcb9ee998/77851021458.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608161db584e4---rimexoxam.pdf
    • http://bioident.pl/photos_fck/file/rawevupotoremebi.pdf
    • http://fullcolorspandoeken.nl/userfiles/file/80613436.pdf
    • http://taiwan-casters.com/userfiles/file/39028281619.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/8fb0ef954c904980cd713714253c361f/69193596857.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5acc765f04---finemimi.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c52e3e9571---disunajufaretesewifukurog.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=problems+on+nodal+analysis
    • 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_off0000c5d6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D6 16792 bytes
font_01_sfnt_off0000dde8.bin
3262972d3b0ffaf63d1592d53537c8dc59bd94d9cc697c9ecf251853851f40da
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE8 16628 bytes
font_02_sfnt_off0001095d.bin
089895f7084eb2847d45088606ff8ce6507251532b5af78dc7d93bf5bb35bc1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1095D 10564 bytes