Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7c70eccde72ebf6…

MALICIOUS

PDF

77.3 KB Created: 2021-03-25 01:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 51c4a9b7b56c5c35c9e143ea8d2dfc43 SHA-1: e22806d695f820bfcf389a802169393992ac0e54 SHA-256: d7c70eccde72ebf6b9b24f261f8d6ac60aeb1283c22a57f5c67aa6ac4f0b4b32
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/wix?keyword=major+calyx+function PDF link annotation
    • http://qwonder.space/bonds_payable_on_balance_sheetjjd5y.pdfIn PDF document text
    • http://wigageturuv.mywebcommunity.org/vizio_sound_bar_5.1_replacement_parts.pdfIn PDF document text
    • https://nudegono.weebly.com/uploads/1/3/4/6/134682657/sotaki_puvemufiterop_xidirizokupik_vilopegedobu.pdfIn PDF document text
    • http://com-servers.online/wejoxexamilukiptefi.pdfIn PDF document text
    • https://toraboretopupu.weebly.com/uploads/1/3/4/7/134769369/naroraribuduz.pdfIn PDF document text
    • http://skout.tech/lugabamerukonugodazin4z0pa.pdfIn PDF document text
    • http://goriwekaparagi.iblogger.org/akademia_pana_kleksa_ksika.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/exportacion_de_aguacate_hass_en_colombia.pdfIn PDF document text
    • http://gidpopiteru.com/ar_15s_for_dummiesiogfv.pdfIn PDF document text
    • http://1xbet-football.fun/best_free_drawing_app_for_ipad_pro_with_apple_pencilmbbnt.pdfIn PDF document text
    • http://fufejezonodim.mywebcommunity.org/sumiximu.pdfIn PDF document text
    • https://rafomuvufeja.weebly.com/uploads/1/3/1/8/131856077/615d5613c.pdfIn PDF document text
    • https://lezafopiga.weebly.com/uploads/1/3/4/6/134628758/e0ac3b8a09a.pdfIn PDF document text
    • http://rivepozepuxar.mywebcommunity.org/88880820677.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vuzozan.epizy.com/bupivobirozanazibisa.pdfIn PDF document text
    • http://kepatoxa.epizy.com/nurejuxalodiloju.pdfIn PDF document text
    • http://xotaferuju.myartsonline.com/ascon_tecnologic_k38.pdfIn PDF document text
    • http://zepurudevivo.rf.gd/aplasia_cutis_congenita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bdee94e-2679-426e-86c6-30a096650ed5/how_to_do_calligraphy_with_tombow_brush_pens.pdfIn PDF document text
    • http://tefetuzuzip.myartsonline.com/lepiliwusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06eb85cc-29a1-4534-844a-f0462f663452/black_ants_and_buddhist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc09d591-a78a-4b0d-8acc-da8b274e54b6/suwur.pdfIn PDF document text
    • http://fobajoruvibu.epizy.com/japaxagajitoferelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/988f2b9d-f934-41f6-b270-d7327221ccb7/medicinal_chemistry_books_for_pharmacy_free_download.pdfIn PDF document text
    • http://tavamikilav.myartsonline.com/forezagekonimesofadedigo.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FB 4948 bytes
SHA-256: 47705fe2a71bb2d49f700eb3c7b4a7ee6aa63ec2ac74d94cdd86496069a13899
font_01_sfnt_off000102ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FF 11044 bytes
SHA-256: c6a089f929f7dcb99d9d90e711c9319cc4dd461c487e810ddd45f8118ffa06c2

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