Malicious PDF — malware analysis report

Static analysis result for SHA-256 d116532613e3c150…

MALICIOUS

PDF

87.2 KB Created: 2021-07-01 18:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b5ee332ccb11093e0d5a94e8e47feb9b SHA-1: e602afb0a053ade409cc39cc27ae6147104cd17c SHA-256: d116532613e3c150b2567c5a8a6f6e24116ecb3b97adeae0b0653fa709b551cc
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://botosani.ro/img/uploads/file/buzagimuberuladofefer.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/apa7a0clqi0ljfg23a123gg6bi/momewasufo.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/96de31da7ffbee74eb72218c94f65839/18554004785.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081147f8e3e9---66671658328.pdf
    • http://provia-events.de/pics/fotos/1/file/26548459889.pdf
    • http://maility.pl/_ADRESuserfiles/file/55928227980.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073df94cd779---tawekofopitusaja.pdf
    • http://cezanart.com/userfiles/file/dudiwuvinudexefibumawowiz.pdf
    • http://elateridae.com/images/FCKeditor/file/15301830764.pdf
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/e3c7ba61da576260582223c19f3f4211/55270929808.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc84c15bd4---67891216586.pdf
    • https://aspaeng.com/files/image/files/11772724687.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2d383e9e8---23925171206.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3d706eb3e---34585743294.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/dha7l6vc91ies2duv7b0hv6lph/52752108765.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160712705b9951---68876431010.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/1f6b0a87eaac7cc33161b03ec2aa33bb/fumoguzowekujunejavena.pdf
    • http://wskinbody.com/data/boardData/files/sejigevarewiluwomegi.pdf
    • http://dermalab.pl/userfiles/file/suzitoxorijov.pdf
    • http://www.hydro-tg.pro/upload/file/zotituzutuso.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5ccc9306b---50753998674.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160954f927814c---92306123782.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/s2f2cos8f6jboeuv1cbsqv34ae/kerozo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=top+10+famous+scientists+and+their+inventions
    • 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_off0000f1f4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F4 16792 bytes
font_01_sfnt_off00010a0b.bin
3eb9bb77c6a53e437c3295f0c2d224d2c19b2deb845f4d3ce1bb763da34bb21b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0B 11140 bytes
font_02_sfnt_off000123ed.bin
ec39119627162b9fc85a5ff28cb2f732d1e1a9108c02c56e9d7d554ab2e0b3de
pdf-font-stream PDF embedded font (sfnt) at offset 0x123ED 16852 bytes