Malicious PDF — malware analysis report

Static analysis result for SHA-256 4702158d55f4d45e…

MALICIOUS

PDF

80.1 KB Created: 2021-09-07 02:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c5799bdbc00c58ba9a9683d3ff25e431 SHA-1: 96d489ad4badee80f8a657d7f3f896c3db7d152b SHA-256: 4702158d55f4d45e8cefa3c8104d505b6b9fd06e2a1d5a4d98cd51e65ab6e87a
176 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, many pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of a raw IP address in one of the URIs further supports malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072a1022ccaa---retixabojerujuf.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3211027eb---nibovatojuxaxumajadin.pdf
    • http://tanriovermensucat.com/uploads/genel/files/20494748530.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/cuumd59n9mm9jvociu6d9ttss1/gemurufokeporifusaxesepi.pdf
    • http://www.gonouvellezelande.com/files/zobuvafasabojejafusulifug.pdf
    • http://runningrhinelanderrabbitry.com/clients/875187/File/31163529138.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/32lepi9v3mcttangp5u0dc93mi/viminexo.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/9be88a6ad3f4df7ca3deb402bd17f9ed/9174795488.pdf
    • https://osikovo.eu/webroot/img/content/files/xotuxub.pdf
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ec523f45002---temizinovomeronavine.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a1b6894ba13---46403267802.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160cb7a6f916a7---7027940726.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6e5247204---34061676688.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767e636a0b9---kevisatejerexagewekipaxi.pdf
    • http://cravaluos.com/ckfinder/userfiles/files/2845656828.pdf
    • https://grupo-kayros.com/userfiles/file/4702804881.pdf
    • http://orderkiwicafe.com/uploads/files/bozewibatirusirovam.pdf
    • http://obasekiestates.com/UserFiles/file/golaraxefipez.pdf
    • http://auburn-properties.com/userfiles/files/govemisoni.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f7b1e6a27---7743579364.pdf
    • http://adveotec.com/img/file/59899045542.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610704b124d4f---pezibavagefuzupizugose.pdf
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128f030401cb---69020922778.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a9545e659ef---98608414559.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=aruba+ap-303h+manual
    • 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_off0000d9b0.bin
b253a8d17946b9ec030cf07a16dc1286da6dbb9e4317f3530dbd9f455991213a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B0 16204 bytes
font_01_sfnt_off00010311.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10311 16792 bytes
font_02_sfnt_off00011b28.bin
623c7a8d77753ab1d4485faffb746621faa3fa5d0513410a47a47f75cef00a5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B28 10456 bytes