Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5c0fb68a801a8d…

MALICIOUS

PDF

114.4 KB Created: 2021-06-27 00:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9751ca5172060682ecef0e672f86a5c1 SHA-1: 287b3d2a0f50ca79320af083810e6f6ebdb10e23 SHA-256: 1f5c0fb68a801a8d00ad3fe5d263093e58c35a8730c91acceff39d5b1923a768
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The file contains a link farm pointing to compromised WordPress upload directories, suggesting it is used to distribute malicious content or redirect users to phishing sites. While no scripts were explicitly extracted, the nature of the link farm and the detection as a trojan implies an intent to deliver a secondary payload or facilitate malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://garglob.ru/uplcv?utm_term=quotes+about+fall
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16076ba4c75f85---seseweninofaseworusojo.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/edb85e73dccfc5e90e87f50b3fdfd301/33776910584.pdf
    • https://balajihighfields.in/userfiles/file/47707785603.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609df92f221cd---jumuvidukerutu.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/59a21a911a7f0741b2e29bc7476d2295/jekimogonefeju.pdf
    • http://www.bufolari.com/public/immagini/file/32555414807.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/c3hju0d8rtigt7pkdt5dutp6om/59896381824.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cef3c36124---49467518589.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a4e5c2d98---puxeroteberuluzuzu.pdf
    • http://digemnd.com/UserFiles/file/23768488225.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/ade2df41ffde6c33ae4c99a8a84d6b36/takotivolinigitegezilusew.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdb7cee180---malejivabebutadapeda.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4ac49958d---tagolefowijivu.pdf
    • http://anma.pl/anma_edytor/file/31068463523.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/954cc5b23f4512b7d603b631e2c81c6b/68782946324.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/t0t72td2aq36ocavbsqrvhco8f/simugu.pdf
    • https://masini-de-ambalat.ro/images/userfiles/jevusibavemudavegal.pdf
    • http://skupka54.ru/upload/m/jisenuvip.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a9e745aab---14165252087.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9fe8224e1---40562711538.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/38a053afaa5636d9b3b8210c8428b9bf/67203229002.pdf
    • http://grandwatergatehotel.com/upfile_hotel/files/sodunijuzob.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000147d0.bin
7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x147D0 16312 bytes
font_01_sfnt_off00015ddc.bin
cb5f991bfa1ab09f08d26875cf1a22e6d4687f34d5438c9e8b1ac9fe5bfac341
pdf-font-stream PDF embedded font (sfnt) at offset 0x15DDC 10212 bytes
font_02_sfnt_off00017510.bin
98a5afeb4c39ddc27a1867f8a249a4d3156a256281b73fb60e52212152947794
pdf-font-stream PDF embedded font (sfnt) at offset 0x17510 17988 bytes
font_03_sfnt_off0001a3b3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A3B3 16792 bytes