Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3b6052b4645212…

MALICIOUS

PDF

79.8 KB Created: 2021-07-28 07:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1349e850569045b86c27ae981cfceab8 SHA-1: 413ed8019b7259070ebb93a1b60cb78436c6e30d SHA-256: fa3b6052b4645212ab9559f8ba7fa09ac7c012a28a13c9721c1525b591906542
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers. It contains embedded JavaScript and numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains. The embedded JavaScript likely serves to redirect the user to these malicious sites, which are then used to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://40parables.com/wp-content/plugins/super-forms/uploads/php/files/1bc5e499c089fa95c412d0b660bb55d4/32803532999.pdf
    • http://octvads.site/js/ckfinder/userfiles/files/pabivuribedobawugo.pdf
    • https://dubaimotorcycletours.com/uploaded_images/files/pawodurivofoni.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072fdecbb762---negosujow.pdf
    • https://mallncart.com/userfiles/files/98268303230.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/afc1s19ldksritub2o6923th0e/jutolavufalaluponad.pdf
    • http://abwingssuffolk1.com/uploads/files/19977744367.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608658e2e0c2f---fusowe.pdf
    • https://examonline.org/examonline/userfiles/file/93758195008.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72a5490f71---56096425792.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba0549554e---dinamenebopenub.pdf
    • http://thevisionkharj.com/userfiles/files/vawipudejov.pdf
    • http://huntland.hu/upload/file/22371042627.pdf
    • http://rockycheng.com/ckfinder/userfiles/files/35302894780.pdf
    • http://acudrved.com/ckfinder/userfiles/files/doguxasepelig.pdf
    • https://sonarmusic.hu/up_image/file/durukulorevakikuwuzuf.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef8d1e92f0---dugesikes.pdf
    • http://gymostrov.org/gymostrov/userfiles/file/81240782277.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c63060fc5---mirexax.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c54d1d5b2e5---60074967429.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=jordan+matter+salish+gymnastics
    • 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_off0000bd6d.bin
807e40e835781dd269e41a57b4f467305bdb6f4d301f3d60ba7796782d3da6d3
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD6D 16560 bytes
font_01_sfnt_off0000e8af.bin
16bd67ba608ebd44f803598abeea7ef338f2fb9961925589316a5b9a0b7909e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AF 10924 bytes
font_02_sfnt_off00010194.bin
338adcd9fcfaba8bac4131c6c86f394f1da6ddf450cfabfe36baf5da153a26dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x10194 16764 bytes
font_03_sfnt_off00011928.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11928 16792 bytes