Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e7f3d92f92526c…

MALICIOUS

PDF

89.3 KB Created: 2021-07-14 08:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: cce1f9892b3e7c3018e4174615c293ba SHA-1: 4ceba4189a3c4db684518d80a3232a3395b61568 SHA-256: c1e7f3d92f92526c8139062c7cc462738e42516e6e01750dbb621757bcf0ad0d
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories, suggesting an attempt to lure users to malicious sites. The document body is heavily obfuscated and does not provide clear textual content, but the heuristic firings strongly indicate a phishing or malware distribution scheme.

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://amadpich.com/userfiles/file/34325898768.pdf In PDF document text
    • http://bukhatirhomes.com/userfiles/file/rujetifafufetimominafipo.pdfIn PDF document text
    • https://apartmani-mestrovic-krk.hr/files/71658980436.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/d01u99gkn50562gsj50gtb6su2/feburiwokitesowovufe.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c23d73570db---jelakawipevowedudox.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/vp1mpaoponqpkfetkcstulp84n/bekebedizarilifisiza.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/f9385306533625eecb9df96483d6e379/sutuxifivirewezol.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/fiumqvmuvbq7u7vq396n03k2df/sewiz.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/riridejojodidapawoliju.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/7f772ba28d0d56c3c2c0034731945b99/52297168124.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/9de4c4f8be70b212c9302b7e9efb27f7/17164544226.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/kipufawutegem.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/bc1e90b96220f9368e62ca92dda08a57/87398375028.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d8da4824f8b---404384896.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/2703132639.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16082fc970bcc5---71934411497.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160edcc9a04dad---5510214255.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f913a4d9a---mefapizisubenerobopom.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/4828025879.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/40785920462.pdfIn PDF document text
    • http://berbun.com/user_img/file/98978831629.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/b78d61d71c146f9a496ec8dc2ffa64e1/zegonamogijasotuzonobi.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/c66b436bd1f0b1be4076283311c33f17/82455574328.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=lucky+patcher+cheat+gamesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11211 17744 bytes
SHA-256: 308c3f1a6a7bd5ed06507cc908602a8cbbf8e62994ba4a5ac698f47c8831b5b8
font_02_sfnt_off0001409b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1409B 10724 bytes
SHA-256: f1811b10d0d0c66df78de8c9cef030c6315703646c8f39e58feb8077342a5457

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