Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2c1873f768d10e…

MALICIOUS

PDF

71.6 KB Created: 2021-09-02 16:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 496d3c4aeadc0f7817f38e8f53c380b9 SHA-1: 6319c0a16524015393cdf2a91bf72f2d05dc5a54 SHA-256: 3e2c1873f768d10ebb17ffbcea6040c96e4253d81aadb7effce4fc17993e9121
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/324f5df633e1743b5748cfbeeb1ffc5b/33616578631.pdf In PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8a580bcc7---97032898560.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/0209efec11625b7129de3649dfd6ba2c/xugol.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/56109979263.pdfIn PDF document text
    • http://sns.hu/_user/file/31451423935.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/janoraxumajibabitumafumo.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/sikeperepuzipasasipumok.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/72726437682.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/992634533.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/jojokat.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/60918914241.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/25817490957.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92112e17ec---mezisinetegimedon.pdfPDF link annotation
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fac7779fe42---vedigu.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/133c3a72f5b781897d23dfe7caae7efc/futasu.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/gedimijexaxuxadufodigegul.pdfIn PDF document text
    • https://hotnewsmd.deca.md/upload/userfiles/files/woriguwagelifesalowivo.pdfIn PDF document text
    • http://easttbirds88.com/clients/d/d7/d767393c090093bf18db16876c07b5c3/File/sovetabukonebina.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/pijosuruwoxaledutiviririb.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/sobukasililajevuke.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/13132687045.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/5453c08a42217d9a8ff071f8e7f02b6e/52279617254.pdfIn PDF document text
    • http://boatmonies.com/uploads/files/zenuvabifuzaxawegoloteki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=central+dogma+translation+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB43C 10872 bytes
SHA-256: 358e5dea7bdfc9c32f56be21545676f023b1477796cb75930a060aea618e7f06
font_01_sfnt_off0000cd20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD20 17692 bytes
SHA-256: b461d00b7bb3f610225ac351beee18c59269eac24f7ca66ad3ac7e6dbed2ec62
font_02_sfnt_off0000f907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF907 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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