Malicious PDF — malware analysis report

Static analysis result for SHA-256 567bae701d3a3ea7…

MALICIOUS

PDF

81.5 KB Created: 2021-09-17 22:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 797826c1a285635ade05fa532340c594 SHA-1: aac16b8e42849bc8df399b722cb976d23b2c5310 SHA-256: 567bae701d3a3ea799af2b57323264ebfd7312cb7fb977d46e927ad3e38d2236
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains numerous links pointing to compromised websites and link farms, suggesting an attempt to redirect users to malicious content. The presence of external URI and compromised CMS upload links indicates a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://pixomot.ru/uplcv?utm_term=wifi+dns+settings+android
    • http://4reality.cz/userfiles/files/78979875370.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161314dc72e49b---xojajix.pdf
    • https://officialbacknumber.com/editor_up/2663270814.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/9c48d9399fd5f6ae6781ae4d0f94f573/rixewumimopafasabir.pdf
    • https://yukkumpulgroup1.com/contents/files/wileriwagikipikam.pdf
    • https://albawadiroad.com/userfiles/files/8567172604.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee4224f49c---78518845389.pdf
    • https://minlinart.com/archive/upload/files/85383591723.pdf
    • https://liur-krd.ru/userfiles/file/26454083384.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/a2c35b2826658e9ee88c691cd3f73da4/27739351428.pdf
    • http://dh-cell.net/ckfinder/userfiles/files/29328266170.pdf
    • http://pibar.tw/uploads/files/202109051221046959.pdf
    • https://trsoftyazilim.com/genelresimler/file/pefobegidiwaxarepowuk.pdf
    • https://diphong.com/uploads/91089936904.pdf
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/13712873503.pdf
    • https://cebrigantina.com/025-CEB/images-editor/file/kejugilipuwon.pdf
    • https://bahispesinde.com/gnc/veri/_files/99671565118.pdf
    • https://mlbcsimleague.com/ckfinder/userfiles/files/99551002239.pdf
    • http://daiichibus.vn/uploads/news_file/36737085901.pdf
    • http://escrima-rlp.de/userfiles/file/dulunekigow.pdf
    • http://devison-matras.com/upload/file/zosukaniji.pdf
    • http://lifebeachvilla.com/uploads/image/files/witimitorekuwanovipabido.pdf
    • http://akcjonariusz.com/UserFiles/file/vekorilafedidipepufu.pdf
    • 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_off0000d828.bin
6bdffdcf6eacce77b76f8aa4e64837cee2508688a04bc446af7a298ba0b7eadc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD828 18672 bytes
font_01_sfnt_off000108a3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108A3 16792 bytes
font_02_sfnt_off000120ba.bin
ca131538e18f01470bb81687c092ac823fde62b29ab91134f61b2cf8359c7113		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120BA 10476 bytes

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