Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa169a96dc000665…

MALICIOUS

PDF

86.4 KB Created: 2021-06-27 02:34:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8c9cc00d9490f732b3f68dcd43d4e6ee SHA-1: 37a68527b6c0e1572804994baac875cdee79d445 SHA-256: fa169a96dc0006650e7dba801e85456d24a28d54f58dc99f32b52a9a940094d0
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories, suggesting an attempt to lure users to malicious content or downloads. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/2f9de3bcc372b45b0ce418f15ec4dff5/kunusebotexerudadizuligo.pdf
    • http://msamerica.net/clients/873634/File/24726229982.pdf
    • http://www.dismaplant.com/ckfinder/userfiles/files/24498190270.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160cc0a30d6de3---fibajosodilivad.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/n6gmdm56h0aj53rh8ah2b38ho6/dewew.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/wanoxidigotebanu.pdf
    • https://amblamy.ee/upload/file/98943014704.pdf
    • https://securitydm.rs/slicice/file/jegogiw.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f36e1cfbf---wixezokowiperagoxara.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/osrerb2i62uvhrnjssn21u2fut/32229146929.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/g9vjo5s9nuutblblaef2u1our5/xorutumutadedij.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/ed2c6c8b451ade0e4f134fc9c92b0be7/80619350067.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/su2o5u7i15qm4ug9b41ddlv4j7/zuporegadawuzemupezalu.pdf
    • http://klassn.com/ckfinder/userfiles/files/88089128860.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b58e03055---71281434512.pdf
    • http://allamericannursing.com/userfiles/file/xikivakegutilaxusure.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b066ca152e6---semeputox.pdf
    • http://goldmustang.ru/files/files/dolaxorogaxujadugol.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ofg1t0itiur3ntfqqs6hc60i30/losofudadulazajinaroxewol.pdf
    • https://amd-export.com/site/upload/file/sejufuzafen.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160d7b021ecd84---88290610295.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/095aae33baa0e2da648605c551b06cd0/46249278959.pdf
    • http://msinziniering.com/userfiles/file/18051021979.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16075461a562c4---tevef.pdf
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/6c2552b028f2b3b4cfc5a52591ea3740/kagumogu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=nitrogen+fixation+meaning
    • 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_off0000efa9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA9 16792 bytes
font_01_sfnt_off000107c0.bin
a5f92eb053a1b24ad56df7f2f862e6bb79aa8de0d448927bb3b4158487fd28e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107C0 10424 bytes
font_02_sfnt_off00011f63.bin
e9369b649ba4c8ea0b849ff21be37194df9bafd4a921ddfa6fe33b909968b8d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F63 17548 bytes

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