Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b096a78df762d97…

MALICIOUS

PDF

87.5 KB Created: 2021-07-01 23:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b37a8d15faa57de6eff7a48d85da63af SHA-1: 0951b7fe05edbe14a238f59179e40d49709b9390 SHA-256: 2b096a78df762d97681f5ae4fdb09d77b9808af3d8172b8ee9a9cc62c062368e
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to multiple compromised websites and a raw IP address, indicating an attempt to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 9

  • 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.
  • 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.
  • 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://autowagon.it/userfiles/files/vepuk.pdf
    • https://atamergranit.com/userfiles/file/pakis.pdf
    • http://fygl.net/uploads/file/151735436736.pdf
    • http://127.0.0.1/bantraicay/js/ckfinder/userfiles/files/fufajidetakowij.pdf
    • http://vietthanhstone.com/images/news/file/12266332025.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f4e19721ec735ee271596117443e2f00/kowabetorudogeserigafidub.pdf
    • http://h-st.nl/bestanden/files/16082315830.pdf
    • https://coastalstudio.com/images/main/file/61245234526.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ab38aa1bf---9829654143.pdf
    • http://perfekttorun.pl/pliki/12297622334.pdf
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/ea99267c94d674c630926acdf9431812/laturaroso.pdf
    • http://candemdientu.com/Images_upload/files/47707876852.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160c44b4c79090---ruxekuzased.pdf
    • http://bsbcarpet.com/userfiles/file/903121751.pdf
    • http://bundoreh.com/fckeditor/files/file/sekuxasatifam.pdf
    • http://kochamsushi.pl/UserFiles/file/dedupimuloxiroxanokoruxa.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/2c1e28e94371164b321d37f61d1ae269/40228655582.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160becdf665ac8---38939258551.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b1cf29977---18236429500.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f47c1869d10e41ddd663cce59ff1e425/70232999371.pdf
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6a6e52782---75967358919.pdf
    • http://ilkyoukais.com/Images/Media/files/wuwuwa.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c726a4e0e68---35345012785.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8d23bc5406230b550551d754a988417b/datasisive.pdf
    • http://starkhigh1972.com/clients/d/dd/dd83d6d7846a033806cdb512e10d7d7c/File/32246164256.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160adf6264a78f---91128959810.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=microbiology+for+non+microbiologists
    • 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_off0000f0a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A0 16792 bytes
font_01_sfnt_off000108b7.bin
38667f92c76ec71194df49cf9cbd96ceb37676aa8f9063e60e15dae8b45cfce9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108B7 10632 bytes
font_02_sfnt_off00012106.bin
68471c62889fe56c06bef061b115f56af8248df7773f7128ade02725dad81e34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12106 17324 bytes

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