Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ccdaf8e0e7613a8…

MALICIOUS

PDF

87.1 KB Created: 2021-07-02 05:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eb887dc3f744f697d307e4f50055b8dc SHA-1: 37000a80a6f98ad0b992afe8632817c58bdb3da0 SHA-256: 7ccdaf8e0e7613a8e3df62421087042b483475b8954c299a1d86b6dcbaefb3b2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by ML classifiers as malicious. It contains numerous links pointing to compromised WordPress uploads and other disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristic firings indicate an attempt to redirect the user to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c21b933168e---81680322334.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95d584ed4---rebukusexevevovakegejapat.pdf
    • http://zwickerfoto.hu/_user/file/kerin.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/ca4cf668620089d7ed6bb5d75049a3e6/kimakoreforuxelakusokasef.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb4196faa5---gelerofuzunudijujegapewe.pdf
    • http://showpalmedical.com/userfiles/kepewuwifininepitotuvenif.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16081c2ab3220b---febavabobujuzarixelogag.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/d5fa11613d56f908808c02335426ba0f/51772346290.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160808d16abdf7---20954075018.pdf
    • http://backupcenters.com/userfiles/file/xefujaluwedetedobugilu.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b29e20ed93---tanifizisavexujuvivuf.pdf
    • http://hjtech.org/admin/upfile/file/14007352246.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/8e46b05b2764d3f7adaddab9e074098e/13162889051.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/cjrjdcvbl6s18pjomf8ifg6u1b/samen.pdf
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/67063917229.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/pqmpvd7ploh1nruam7hppaosk4/66676658707.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/apuv8ukkvm4o4eee0u6qefpaf4/59824757710.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4cbecab7c0---jubusasudasawijixa.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/44d1412bde020eb169c37b7dbe3a2b06/raxigugaj.pdf
    • https://airflow-skateboards.com/upload/file/63437396670.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5c2c018e6---zijovobanefojisawobazut.pdf
    • http://angarakshaksecurity.com/userfiles/file/zafekage.pdf
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/kegusuxitigopogava.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a2db83813b3---xopukutegedilutisizosu.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/6pncg25rletrk5tbpv6lik3as8/boregok.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=testicles+do+not+descend
    • 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_off0000f3a6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A6 16792 bytes
font_01_sfnt_off00010bbd.bin
474343f2948985fbd974e5267e6ba340335f813f37f3063638ddc23c534b088c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBD 10064 bytes
font_02_sfnt_off0001223a.bin
a91a4f86279e3cb99f7466e68c25d767134cfd4b924ebe300eaddae2ff44ce36
pdf-font-stream PDF embedded font (sfnt) at offset 0x1223A 16636 bytes