Malicious PDF — malware analysis report

Static analysis result for SHA-256 353502a679d7876e…

MALICIOUS

PDF

89.1 KB Created: 2021-06-27 04:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f158a4946841ec0f27e8a444e8a63c46 SHA-1: 59e275e9564f675baa6def5e8361f58b32ad25b5 SHA-256: 353502a679d7876e01630226cebdf20ded1eb05dce1ec5b5072e4b959eeaf34d
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites or disposable domains. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/37d9c865398ada14e995697681c9385b/72154814025.pdf
    • http://puppies-4u.com/clients/e/e7/e7f09595da74c05d2059c741134300d2/File/11730787785.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d7a304798f3---jejadebefakenixuxenosaxut.pdf
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/f111ceb536dd843e6802e31b7da06131/ziduvewamosas.pdf
    • http://avsa.org/sites/default/files/images/files/21342135401.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160d20fbe2f3cc---kerotumisubezume.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/badfa50ebe1b6174796e8670827e1708/64495928462.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607e309164b9b---jesaji.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb3c493ee7---54976508678.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d6464d9e9f4---5485568660.pdf
    • http://webinaris.org/ckfinder/userfiles/publics/files/74899789382.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d55646dbc---zigusunimazotekefoxo.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/59636b100bc1d33b70935d538dcee32c/65124296711.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce2ccc8ce5---23502599257.pdf
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/tabijukuragomotedakipapij.pdf
    • http://porpora.eu/imagenes/imagenes_contenidos///nafumatijik.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/338cca38b9c1354134c0347bc924bd09/zawefesuxivukovelagoz.pdf
    • https://bishopsalamatkhokhar.org/userfiles/file/4459495910.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/a6rabh50e5qbi8pdtt3fbm1289/27253626150.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a98c53386e8---34283820518.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ogu880ml2eddlqtg5mo81al466/pifevulebikimafubomet.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16094be03e83a1---1063114634.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160acb8e362561---rusowib.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0f3021346---puvadasugunajujerivo.pdf
    • http://shuswapladystriders.ca/userfiles/file/1948602273.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=on+site+remediation
    • 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_off0000faf9.bin
2faccd81416b6b642ee9873ffef878d4f1f62722318b043ac8987e095e7f2624
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF9 16540 bytes
font_01_sfnt_off0001260c.bin
aff0dbc04ede0a6c53a29432b3b051cbc161cd500156d78979e88550b83640cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1260C 10388 bytes
font_02_sfnt_off00013d99.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D99 16792 bytes