Malicious PDF — malware analysis report

Static analysis result for SHA-256 01652de84075bec7…

MALICIOUS

PDF

84.0 KB Created: 2021-07-04 01:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af792a7235771fc4aa135c4e10180913 SHA-1: a9d2f2b20bf4060cd62da5efc05c4ec46867d640 SHA-256: 01652de84075bec7681bb5ea261f3db3fad4ca44aa81e9756e3bfe404e3e5e52
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains a link farm pointing to numerous compromised websites, likely serving as a lure for users to download further malicious content. The presence of a 'download button' heuristic further supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vicorsupply.com/uploads/images//files/50121293537.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/e64a1c6ce6d56d6b060e0d3754ff99a4/92248897791.pdf
    • http://abwgulfport.com/uploads/files/41512755884.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f3a45fd1a---rezivojixe.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/c927de0eeb9b6633539912cef1931afe/tuvodisovak.pdf
    • https://burlingame.com/wysiwygfiles/file/87040161889.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c0cae128459---33366846983.pdf
    • https://eltonltd.ru/sites/default/files/uploads/pisemewusamekafulekog.pdf
    • http://investin-khj.ir/ckfinder/userfiles/files/xosarebekanoxem.pdf
    • http://aranykoronakft.hu/userfiles/file/pabuwe.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bbac4ee36---tesozonen.pdf
    • https://lescourailleurs.com/upload/editor/file/warurepuzefevodajazubava.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/db5582aefe3a20c4e1986455d043214c/bokiwabetefixevidufupajo.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a947fca11fa---15748512957.pdf
    • https://yildizwebpaket.com/calisma2/files/uploads/48366409850.pdf
    • http://aite-materials.com/upfiles/file/nujok.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d95549719---dutulirebepekusoxuxivez.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1609d94ced0507---fafujojawe.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/6a24b1f34c7d6750d2deca38e05f802d/rafobefevaxaloxolux.pdf
    • https://used-machinetools.ro/app/webroot/files/userfiles/files/wujuvipexevuxotuzoten.pdf
    • http://prime-standard.com/piceditor/file/lipajatofonotupo.pdf
    • http://suachuabaoduongmaynenkhi.com/img_quanganh/files/fajamej.pdf
    • https://bio-obst-und-gemuese.de/userfiles/file/60154219570.pdf
    • http://soles2walk.cz/data/file/83548543427.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=creating+a+slideshow+in+powerpoint
    • 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_off0000e70c.bin
3b1c09b29311b4f15e0c6af3222a0d1b3d76b56a05efbdcf53e49b5ef40cdd3c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE70C 16432 bytes
font_01_sfnt_off000111d7.bin
d0abe255dd63d6592a555742182a7ef93e70e8c9d0ca7787c7791d6fe89fc050
pdf-font-stream PDF embedded font (sfnt) at offset 0x111D7 10788 bytes
font_02_sfnt_off00012a7a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7A 16792 bytes