Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0398b04d2652a5…

MALICIOUS

PDF

89.0 KB Created: 2021-06-30 06:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a0a6dc465d90fcc5569e4c9884ea7c96 SHA-1: cb59f491e1cb166249c8a5e05d29d867004c784b SHA-256: ea0398b04d2652a5978eec1498523f5c280b5607cd205196ae2470c5c03b76f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the numerous embedded URLs indicate a primary function of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/73bd081f2623b0ba594f058f4802aa66/jeturewiliwurugoxizeto.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f944ed618---xakopegiv.pdf
    • http://ampletrekking.com/userfiles/file/wodamurugabuxanijixi.pdf
    • http://fritz-fahrlaender.ch/download/lukogugiwazuzo.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/ltrfoumcknpjk8ka86arulsvqq/10036517747.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/7e0448d4f781fc78621e22a78ca3d1dc/77090889355.pdf
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/ed1236ec0bb859e7b8c0e37551c0c189/tezixegexozukebiburas.pdf
    • http://babamoleskine.com/files/file/jemogixiju.pdf
    • http://asja-doll.ru/userfiles/file/rugajesaripovala.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160941094afa03---27853891518.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/8170c733aae585a47401839111517cdf/19372159857.pdf
    • https://bibliothequeanglaise.org/upload/files/80866846393.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085017ecdb96---disetajagisunopowukat.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16087f60d90e1e---nesidisumezipuvulabegewi.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/96d29bbba98c0dd3c1e7bd0e9a724f6a/44888561593.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f063cb4953---zifuforituguduvigir.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abcac2bf6f9---86655326731.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/1c2209449363b48d9ecb3916257e1678/fakobegobe.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160add393c70de---65656255737.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd426c35f1d---70608037639.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//11154274008.pdf
    • http://modamoda.nl/uploads/pic_lib/file/55438345379.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=the+priory+highbank+centre
    • 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_off0000f62e.bin
e4b655642f668716c15e7508db409963b4c37c36766ef24829b3410fbdd36eac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF62E 10748 bytes
font_01_sfnt_off00010eb2.bin
5971e2b715439d46b0369ac8c43d72adbb285d9ac2562e1fcf486889203b2738		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB2 17776 bytes
font_02_sfnt_off00013d5b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5B 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.