Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48d889775aa6bed…

MALICIOUS

PDF

95.8 KB Created: 2021-06-25 12:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c598aff2afa0e836f6c2b2f8b280f8bf SHA-1: 32b07dd9d7ca84e595fda35b03a4511429d0497d SHA-256: d48d889775aa6bed71e22d92f2f86801e7359c3c147f51aa0211b05083dd9b59
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a password-protected archive lure. It contains numerous links to potentially compromised WordPress sites, suggesting an attempt to host and distribute malicious payloads. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946670010d7---3967213161.pdf
    • http://kaowei.tw/image/files/20210529_131815.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c6805e471---nopobufokizidegajuku.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/450d10d7e466f0ef00373977c8e9e8cb/tukegokovibowatesawor.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/2fc44722fe60678bed5aacd4af810dd6/76363263137.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090186b91561---puzinunifipuvidupi.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160ac09b4a70fe---gafojanewezimopazevitosid.pdf
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/baf0f142bdb3627bd31314fb53b59d50/gavemigaz.pdf
    • http://nwatchonline.net/userfiles/file/16131090277.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b1599e03697---soserapikiroxuxarejog.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607aff8a62e59---47717333043.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16094261c8216b---55279887584.pdf
    • https://kovosluzba-praha.cz/res/file/zexokuw.pdf
    • http://bike-aholic.com/UserFiles/file/rowogapo.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/b6cdd168bc1c12ec1e86829ea801efdd/73492506469.pdf
    • http://asianmosaicnyc.com/userfiles/file/24644474710.pdf
    • http://chapmanhighschoolclassof1968.com/clients/c/cb/cb1fed5110c07f199f416a264ee6943c/File/xasepawemimukodijekamow.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=the+sims+4+apk+free+download+for+android+no+human+verification+2020
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6cc.bin
1cab05b36de487d339e96865a601353d57147bfddd0d40c2fb1709b55d6c45f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CC 17636 bytes
font_01_sfnt_off00012491.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12491 16792 bytes
font_02_sfnt_off00013ca8.bin
a974da271cea39bcf043457f67d25ba2f8a8d394ad75d4afc3d8c6049d9cb69e
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA8 11512 bytes
font_03_sfnt_off000157e1.bin
44584340b61650b604f9ac0862651ce4a5ee3a0fbb8a330c4fc32adea4755216
pdf-font-stream PDF embedded font (sfnt) at offset 0x157E1 16708 bytes