Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b678fe7063e032e…

MALICIOUS

PDF

83.2 KB Created: 2021-06-27 05:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4e2e83740ccc35230c18f0126140e81b SHA-1: dcfaa19945361f4b023401300642a139e82eb86b SHA-256: 4b678fe7063e032e2228170dd182f04b06863fd5b2fcd276b0b2069cd37cb75f
196 Risk Score

Malware Insights

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

This PDF document, detected by ClamAV as Pdf.Phishing.Trojan, employs social engineering tactics to trick users into executing commands. The 'SE_CLICKFIX' heuristic indicates the document instructs users to press Win+R or paste commands, likely to download and execute a second-stage payload. Multiple URLs point to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://garglob.ru/uplcv?utm_term=how+to+use+2nd+monitor+with+laptop
    • http://lukoilmarine.com/ckfinder/userfiles/files/54087325536.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/542a5b93821d68272c4b997a23cb21b4/56849137689.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607d30a195938---58635516960.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/87ct5qld7dscuiadqbc5jfeag2/bomiji.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc66a094e2e---vosawijowivofazele.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/18b5c161c39f63bd3286c56d9b0a651e/xofox.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/85cdfd125f03152808b55f0ce313aff2/pozabinosefujamafu.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160838da2904fd---gapipevumevi.pdf
    • http://hum-lucknow.org/test/fckeditor/file/64316337486.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/d302e5eef47655c5255c44d87d58ba3d/88470368672.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/8b1c6c01c9a0047c1496a61a4ff25408/67096520875.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7f23ae0db---88765269239.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/13387c8253fc4e3d73b162f440b12a05/tirikebudaninulimetumiret.pdf
    • http://apvn.info/userfiles/file/wogawumigi.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/b8eac3cf35d49c88b7355c65b0ac9f84/14206569002.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609476a7b19f6---83490184568.pdf
    • http://grawerlik.pl/userfiles/file/kenasuvugesixu.pdf
    • http://soft-pro.hr/upload/datoteke/26800038682.pdf
    • http://sgyscom.com/upload_fck/file/2021-6-19/20210619074327149997.pdf
    • http://phuvuongcorp.com/luutru/files/59201070979.pdf
    • https://bhsbeacon.com/FCKeditor/file/gapejogumeradire.pdf
    • https://kisikana.hr/userfiles/file/11348643766.pdf
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3972caa8a---95625018551.pdf
    • http://avandcie-automation.fr/ckfinder/userfiles/files/kekurolagajotoxojo.pdf
    • http://rentaruedas.com/files/others/xegufo.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_off0000e194.bin
d70d4d16af3811425a2fec5220165f9bc97011e0282f00856664f375b87104b6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE194 16928 bytes
font_01_sfnt_off00010de9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE9 16792 bytes
font_02_sfnt_off00012600.bin
5c1b05f31b7a8758b8eec2e2032e2b9092edc38452f3840d2a8a3465bfaed930
pdf-font-stream PDF embedded font (sfnt) at offset 0x12600 10952 bytes