Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b908f26a1da1db…

MALICIOUS

PDF

99.5 KB Created: 2021-07-02 15:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5d293eb9c2a5ea149f082167de042fe2 SHA-1: 306ac3b3f51c19a99351b662496e43da0d5d0011 SHA-256: 01b908f26a1da1db78d85c6bd18190b074df5b9bbe6a6a3cc39a024e83628f67
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites and disposable domains, indicating a phishing or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or downloads. The presence of link farm heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607894172b1bd---vowapuzidufofozukabidiso.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608176d60e31f---64861544037.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d6ecade96---bezer.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/6168d03be55e266c94b92a3fa6798129/diwupetijogego.pdf
    • http://hzzxtl.com/UploadFile/file/20210623114339146.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/edprc5h8pci0hlhm7hfvq4e2jv/mamikunorumegu.pdf
    • https://poolpoint.be/uploads/file/40354686606.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d53e76506b---vagoven.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738091dce4c---38464746207.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e35e30de6---dumazebinefuvogaritejesox.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e29ae9b7cbdd7ccef5e4b45201279e73/vesemedusatukax.pdf
    • http://mtcclassof81.com/clients/0/0a/0a45bd3013a8cc77df817aa526a911b1/File/93489862252.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/6543fc40d19006805b94c5f1a8a0c3e4/jaxoxarusujisotulazurawu.pdf
    • http://dgjinhak.kr/DATA/upload/files/202106140145567940.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9eccb4ba8---17606575660.pdf
    • http://www.heksan.com.pl/file/tifubamikavib.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/db494cb3e26442b9ceadc1c7f056ac5d/88608750846.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e25da74e5---8971962252.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c329e5b128---62522977360.pdf
    • http://global-insurance-broker.de/downloads/vozofixififafovogemejek.pdf
    • http://jtour.vn/userfiles/file/ribaxujotunewexaravebukup.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/f229dda99ce00f9e99a084905940f575/30488388092.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d2de68cd6---wupibimesejijivuku.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/pevhrmb03a3o0b539hbrq00kg2/87418637172.pdf
    • http://svsteinfurth.de/radsportfiles/file/gazozedoxufubidisina.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=witcher+series+1
    • 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_off00011b32.bin
2352738e1355f17ee6775fa9eb3c838588533f0ad862d3d06080e5354be383c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B32 9940 bytes
font_01_sfnt_off00013163.bin
49ee129004de98ce0160c37a3eb2565f18ff6319c57bf5bf235945af24008d04
pdf-font-stream PDF embedded font (sfnt) at offset 0x13163 21980 bytes
font_02_sfnt_off00016752.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16752 16792 bytes