Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd0516517f254af…

MALICIOUS

PDF

88.8 KB Created: 2021-08-23 12:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 11ae6932723130e6fdd860b4e2f3f592 SHA-1: ed13bb12ea926280c5257e2f656be76e11757e69 SHA-256: 1dd0516517f254af327c8be85e9875f4be4e13ea73f38db6ab2688fc1f42e8b4
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or downloads. The file's structure as a link farm is a common tactic for distributing malware or conducting phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/205234098.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/8dff32ca759ae6fd5846a29776362978/pukorakima.pdf
    • http://masonhn.com/d/files/furemefixakuke.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa58528e81---88302549733.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/dqqgak886t91adrls40oohipfm/79565070884.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/363a2b1c028af8a98b1c12b9f33ff7bc/59426279557.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c35e3a1578---20326795007.pdf
    • https://cosmopolitanhotel.eu/uploads/wysiwyg/files/pitajitolaresez.pdf
    • https://lombardpruszkow.pl/local/userfiles/file/lobiregedifonugerif.pdf
    • https://tenshinorchids.com/FCKeditor_upload/file/38804400265.pdf
    • https://megalightgroup.lv/uploads/files/27082534842.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a22d7c74869---33065426509.pdf
    • http://cloverdiamond.com/file/16565444160.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/39649f37fd85e1a0b50381ef476d80d6/83640510872.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fb25ad791---18829918408.pdf
    • http://kapsalonvogue.nl/files/file/49266955127.pdf
    • https://acronimocostanzo.com/userfiles/file/lakijevatinoxojojafewifug.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/45ab9e69e4432a15f6063b8785d936e9/193482071.pdf
    • http://auxerretv.com/content/public/file/joferexebaposafafikajo.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16082a9a686889---50857242680.pdf
    • http://work4shop.cz/userfiles/file/farofiwafoxumumunegoxur.pdf
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/dedalagotixoz.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/00002f89281816b030d01dbeb1fd7d93/73688655621.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=android+1+mod+games+offline
    • 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_off0000f96a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF96A 16792 bytes
font_01_sfnt_off00011181.bin
f1a0b95d197ad6bf17e76a31d7eb1701b20ebfe55f5eab9af218d46a7f314edd
pdf-font-stream PDF embedded font (sfnt) at offset 0x11181 10632 bytes
font_02_sfnt_off0001299c.bin
32a6a789e0ca3b8ee5757c4001db4407635003846e7170be772fe100ecd5f4dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1299C 16564 bytes