Malicious PDF — malware analysis report

Static analysis result for SHA-256 67071247235624ec…

MALICIOUS

PDF

75.6 KB Created: 2021-09-16 00:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b5a894ad87fce54c62555ea66d95d58d SHA-1: 49744438f8caf15f3bed353170ffc9242577d474 SHA-256: 67071247235624ec178f4e5aa563f104dfa84cdbc391200b48ef002d1357a21b
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to disposable hosting or compromised CMS upload directories. These links likely serve as lures for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • 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://magogaralbamoble.com/galeria/files/kilekanojuribepokoxem.pdf
    • http://sprostredkovanieuverov.sk/res/file/kotejeganavajopafub.pdf
    • http://artbaget.net/admin/ckfinder/userfiles/files/49699157505.pdf
    • https://gastrotest.co/ckfinder/userfiles/files/tasesudinuz.pdf
    • https://netron.pt/app/webroot/media/files/zafegifog.pdf
    • http://www.corazondelsol.es/ckfinder/userfiles/files/ratepedamagaxosarukak.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/540a4aea1d27b3688687af5e209dac10/16429142851.pdf
    • http://fernandopelosini.it/userfiles/files/54992419983.pdf
    • http://chekeeh.ir/basefile/chekeehir/files/sokemimamowox.pdf
    • https://synersys.fr/contenu/file/17691301180.pdf
    • http://eichler-kammerer.de/39849979843.pdf
    • http://namngonviet.vn/user-/files/89548768169.pdf
    • http://zh-huaxun.com/uploadfiles/files/35367580607.pdf
    • http://househouse.it/userfiles/files/besaxagekukidixizutu.pdf
    • http://wolfroccatiassociati.it/userfiles/files/nirukajevilibo.pdf
    • http://kimkhimientrung.com/uploads/image/files/poduwabiporatun.pdf
    • https://thai-airpark.com/ckfinder/userfiles/files/41656174558.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132ee1987450---mozivusakelelunegodub.pdf
    • https://alnahamgroup.com/userfiles/file/ridifa.pdf
    • https://alicantea.centralcms.cloud/galeria/files/12446479979.pdf
    • http://litho-and-co.fr/ckeditor/upload/files/4827217492.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/f7794fe972ee93204b4f45f88286ff43/nesemoje.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=bagaimana+cara+download+game+ppsspp+di+android
    • 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_off0000c22a.bin
44aac432b2423e671294df89216f7603146d65329ed535a0691c1f4446931803
pdf-font-stream PDF embedded font (sfnt) at offset 0xC22A 10896 bytes
font_01_sfnt_off0000db31.bin
cc41992f00fc9f5ca9e32201d9962185887db4db2baebe3756f5fc2b64ab6f72
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB31 17456 bytes
font_02_sfnt_off000108a1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x108A1 16792 bytes