Malicious PDF — malware analysis report

Static analysis result for SHA-256 205e79ab7e67ff06…

MALICIOUS

PDF

91.9 KB Created: 2021-09-08 17:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2b7aefe9cdc9e63828f47a9d47f82e5c SHA-1: 0849c486af4e569d4840304e5851e7e1981820fc SHA-256: 205e79ab7e67ff06f9d70d2eb817f1271430539463a2cb65bf9c839244638c9a
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 an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm, with several URLs pointing to compromised CMS upload directories or disposable hosting. The document body was unreadable, but the presence of numerous external links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://mallncart.com/userfiles/files/63632384002.pdf In PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/fepugevamajefedinukeb.pdfIn PDF document text
    • http://cuacuontoanthang.com/media/file/82638706341.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309eebc01d1---rukarugogaxivijeg.pdfIn PDF document text
    • http://phelieuviethung.vn/upload/files/27006779127.pdfIn PDF document text
    • https://booburger.myagenda.cz/pictures/editor/files/90499170228.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/bewomubogapim.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/rikidafo.pdfIn PDF document text
    • http://rancholasmonturaspremios.com/campannas/file/zobixek.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131702902474---31484938364.pdfIn PDF document text
    • http://lecostationery.com/files/file/71774429216.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/37360402336.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/2f7ef2beed7dcecfb54fe55b6b65af0b/708707170.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/16057236935.pdfIn PDF document text
    • http://artvideo74.ru/upfiles/files/48324604247.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/75041506678.pdfIn PDF document text
    • http://emachn.com/data/attachment/file/mafejipe.pdfIn PDF document text
    • http://seowonbattery.com/files/fckeditor/file/23601347161302d3ba370b.pdfIn PDF document text
    • http://salamatekhanevadeh.ir/ckeditor/files/files/rasudazubiwifarirefiseni.pdfIn PDF document text
    • https://orrizon.ru/images/file/nalagovalafukaduse.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/15326606118.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/dupeti.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161332e7ad08b9---baxipewezijeluvudabuzivox.pdfIn PDF document text
    • https://iuoshili.com/upload/users/files/nujakifuwewaluko.pdfIn PDF document text
    • http://scoutpate.com/userfiles/file/derepotevotomokidi.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/8c376f2af012f3a2772c1a34e81d7fd6/33082321599.pdfIn PDF document text
    • https://mptradingcompany.com/userfiles/file/84450519940.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=reconstitution+complexe+odontologie+conservatrice+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_off0000fe41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11653 18580 bytes
SHA-256: 5e2e9ec0642da31ff7be456849bddcfa1ada745cd52c26210efa25f993f50c80
font_02_sfnt_off0001471a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1471A 11276 bytes
SHA-256: d36b2a709e8e7228d2a18313fc0e0eff693d8d1aeb01319e67fa5fe4b8d9a156