Malicious PDF — malware analysis report

Static analysis result for SHA-256 015c80f6698478fe…

MALICIOUS

PDF

75.7 KB Created: 2021-06-27 05:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 00b43b9b9c87b6099de84ae95093ba9a SHA-1: a9c193e959ad2c59e4d1d2f62394a84e4a006486 SHA-256: 015c80f6698478fe02a6ab204e79cb995afd362b352838fa60684784a3b9e9da
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to compromised websites and potentially malicious content. The presence of multiple external URIs and link farm heuristics suggests an attempt to redirect users to malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://cakenepal.com/userfiles/file/xofelegidositeva.pdf
    • https://juhaszautovill.hu/userfiles/file/jabapekasazoj.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/7e6fe160b473e370d90ffcbf22f05e37/98252862438.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085056a218fc---66390919283.pdf
    • http://babamoleskine.com/files/file/zaxamepupamulel.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4af0162d9e0cf6e1f19364c3a117a791/winajiniratineliliz.pdf
    • http://czdashan.cn/uploadfile/file/2021050121160073499.pdf
    • https://simondaulte.com/ckfinder/userfiles/files/modikatuwedogojunofi.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/at59e2k0ossb1c12d1ngvn8btb/lunibujitabowufog.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/j9mvlu6j82p38fui52f1gc19ii/lepidigunedopet.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2a44e80cff---wivamuzusemijisetilo.pdf
    • http://www.bash.cl/media/file/51565177210.pdf
    • https://j-kowalewski.pl/uploads/userfiles/files/vulilip.pdf
    • http://birnagarcollege.in/userfiles/file/45269966068.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609642c5878de---kimusezigipapolu.pdf
    • http://fsgpj.com/upfolder/e/files/20210622004717.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b301144a14e---40789887112.pdf
    • http://perles-del-beya.com/userfiles/file/fuzepudone.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/nt0qlg5npdie6a66dso0od6kno/17706353351.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a149b1bdc7c---topazofuxakatiwaginiwupi.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607801d3608c7---39954864823.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=find+three+different+irrational+numbers+between+the+rational+numbers+5.7+and+9+upon+11
    • 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_off0000c1c5.bin
7ac4bba3aa38bc88c97ed4dd86efd52772b4c8fe48d1f99fb7bae91ac617b917
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C5 11536 bytes
font_01_sfnt_off0000dcd1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD1 16792 bytes
font_02_sfnt_off0000f4e3.bin
167cc9c7eaa67a3c9bbc68f00c5e0c5433f31eae388780defbd13a39c02aa245
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E3 16788 bytes