Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a26ad9a622e7f0…

MALICIOUS

PDF

88.0 KB Created: 2021-06-28 16:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0129d397d05573aab2a5a2bac0348d1f SHA-1: 00fd0adeb50b5955e8c719cfced3eea95f7b3a07 SHA-256: 12a26ad9a622e7f040e233bdb86f3eb648c83a73e9340728616a98e6ee76c088
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of multiple external URIs and a link farm structure suggests an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://odpadykj.cz/UserFiles/File/18557268419.pdf
    • http://hanleyresources.com/images/82777616498.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2aab6d577---xeduti.pdf
    • http://geometrabottero.it/userfiles/files/jakawunisadovopamol.pdf
    • https://capecoralliving.com/media/file/23158463991.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/oufnqe1nheikhk71skqe1806g7/17437647637.pdf
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/c96a23c1bb77555c14b494090bf3f777/85521504771.pdf
    • https://badoza.net/userfiles/file/70592582864.pdf
    • http://fszhenjia.com/upfolder/e/files/20210528150554.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8472b5a49---tojegetofinugu.pdf
    • http://dlmberatung.ch/userfiles/files/67572074924.pdf
    • http://cestovni-postylka.eu/userfiles/file/guzop.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/08786dc88e6b7b8c0e7bdf801ce002be/fusajiligujitenisa.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609470c17ea00---442767415.pdf
    • http://datavincity.com/uploads/ckfinder/files/67243536722.pdf
    • https://rowadalbyt.com/userfiles/files/93735396883.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813fc922915---rukitugafanegasajodere.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfe0cc47de---79841785810.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/9og2t8ctelbo735b6iuogv0oq6/57219040270.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef05335ae2---nunitojijikifulatowa.pdf
    • http://pleasanthillpchurch.com/clients/5/55/55aa087cacc886b2254ddcc242c0699b/File/14787573356.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=the+new+world+order+ralph+epperson+pdf
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0f6fd8cd3---zelaxewigajafeloku.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_off0000f572.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF572 16792 bytes
font_01_sfnt_off00010d84.bin
969463b8260bba18eb1b7cdee23e74bc30238b28d63b940ec5b246d6c8d874e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D84 18076 bytes
font_02_sfnt_off00013c01.bin
23873042f0ab577832c930afc57811c5889ce56aabddd8150c426d956bad7780
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C01 10452 bytes