Malicious PDF — malware analysis report

Static analysis result for SHA-256 97110e5af86f2f29…

MALICIOUS

PDF

89.5 KB Created: 2021-09-20 02:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6796e5311449e980de473403b8d9bb95 SHA-1: b5bfd3111e28b563f6d1c2fde968db9f65d6a5d0 SHA-256: 97110e5af86f2f29a76bed2819ade8c56cc6edb743ad47c2bbeb96f5f3abadc0
156 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 external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the PDF structure itself are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://smidgel.ru/uplcv?utm_term=androrat+dev+point PDF link annotation
    • http://westhollywood.ilovepokebar.com/uploads/files/xetonusupipababikofatanab.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae72956d9f---ligusulogu.pdfIn PDF document text
    • https://apteka-wratislavia.pl/halatecza/userfiles/file/povuxizaloge.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/32367162965.pdfIn PDF document text
    • http://phonphangschool.com/upload/files/waleba.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/19302813627.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7908a94df---10462179765.pdfIn PDF document text
    • http://abpjseah.news-read.com/upload/files/gikekoje.pdfIn PDF document text
    • http://5percent-design-action.com/upload/users/files/vokoxunajituroxuwekavuge.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161459cfa13595---kepivek.pdfIn PDF document text
    • http://vhz.cz/user-files/55840201388.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2505b9eb2---29637617362.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/3e7b2b54db2782951561a1a836b02739/gesatukezababujidumomudep.pdfIn PDF document text
    • http://albertf.madteam.net/ckfinder/userfiles/files/9676650157.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/kidujasolumoduju.pdfIn PDF document text
    • http://xn----7sbndn5at.xn--p1ai/uploads/files/32422976369.pdfIn PDF document text
    • http://lifeisartfoundation.org/sites/default/files/images/userfiles/file/52558829811.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/22546103869.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/80164267031.pdfIn PDF document text
    • http://cmtl.in/uploads/userfiles/file/file/mebefibolomuwedavarazalok.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/7i413tkerck2o89451vhejehab/rorefapojun.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/xeloninaxiluwakikiza.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/bibul.pdfIn PDF document text
    • http://bdsductri.com/upload/files/penelowulunuwolezewoxub.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/dobifi.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FF 16148 bytes
SHA-256: b17e3c388ca520c70044df51a505a8c8de3d1ca9b2e495c629779bc8d31aca59
font_02_sfnt_off0001088f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088F 10216 bytes
SHA-256: a0c35de82c0a3331c7c5bccdf0897ada000b2b4bf00e41ae5d490c99deacacb2
font_03_sfnt_off00011f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8F 21720 bytes
SHA-256: 510232f978b08d4fec1444b46d8f9d20c59a64d5811fc59563751711705f21d6

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