Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e0772b7ea1063f…

MALICIOUS

PDF

72.4 KB Created: 2021-09-06 13:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 852d3c5eb4279bffeea15288660d1349 SHA-1: d9b8963a08aecc2d8ca1cd20500be3c1f9e6ea72 SHA-256: 94e0772b7ea1063f32c84c68569ec3ca816b0732099d33c7e30bb154cbe07809
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The embedded URLs suggest an attempt to lead users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://falconartistmanagement.com/ckfinder/userfiles/files/riwogofafib.pdf In PDF document text
    • http://fonnepal.org/userfiles/file/3755231213.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775ad1745e7---95972713131.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/u3poqmkr28vrnsnchh4fd49a2v/sibojesoxezonuludir.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/6952778365.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/3fae5829ba49f3020d82ef76bfcf3f56/45283175453.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/fijilifu.pdfIn PDF document text
    • https://smaransaving.com.np/ckfinder/userfiles/files/guvalagiritilid.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/16203237215.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827aef15582---liwanididizuremupozakekel.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/aced58e49b52ea8f6402e945fa9debbd/xawozug.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/kp09om77l2tvdqnk33ftpp6qnl/besuzakukutogezorito.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/63915583879.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/83a7cc9eeb013961d1a455ca5ce06a67/vokafumugakutugixowiku.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c65f94967a---vimususekiravigifivep.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/7149714700.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/xazajijinisi.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/dulupisenukogunan.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/nuledekowokufezipoxit.pdfIn PDF document text
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/nejixenasidepeweraxajop.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/13172808116.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/99664128084.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=carrier+aircon+window+type+manualPDF 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_off0000b641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB641 17352 bytes
SHA-256: ba68f339857839cffbd895427c6f39a1be9a308dc81a599118bc15e47f4c8448
font_01_sfnt_off0000e348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE348 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5F 10840 bytes
SHA-256: e8a810f7b1df988290f9776591d98b37b550135e873758d5eff5d1d3ef6625e2

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