Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd7d78a05daf68d…

MALICIOUS

PDF

90.5 KB Created: 2021-03-15 17:19:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 84f25b885fdb68ab5a5515a128311717 SHA-1: 1c91f96e647c71b945a8a1f8baee49b4c4d3abb7 SHA-256: abd7d78a05daf68dcb2d38c42379655e84d86f97f96badca0fff0a6dc0e9b004
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of external links, many pointing to other PDF files hosted on disposable domains or link farms. The ML classifier and ClamAV heuristic strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded links suggest an attempt to manipulate search engine results or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/award?keyword=platinum+physical+science+grade+12+pdf+download PDF link annotation
    • https://cdn.sqhk.co/verexumifo/EjcgfCJ/senuxevasol.pdfIn PDF document text
    • https://cdn.sqhk.co/vefoxewijuja/tKpghie/1112909325.pdfIn PDF document text
    • https://cdn.sqhk.co/kanemili/Qgchihc/61666484126.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/3vjiJyF/police_scanner_fire_and_police_radios.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/ballade_in_g_minor.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/5JhfiiP/muxagobuxokiniwazozuseta.pdfIn PDF document text
    • https://peninugeba.weebly.com/uploads/1/3/4/6/134666339/3223789.pdfIn PDF document text
    • http://ginixotojaru.medianewsonline.com/37281254267.pdfIn PDF document text
    • https://jibunomo.weebly.com/uploads/1/3/5/3/135348462/0b2485.pdfIn PDF document text
    • https://siresikewutawin.weebly.com/uploads/1/3/0/7/130739490/9e3500d6.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/NAxjchi/transfert_credit_orange_pays.pdfIn PDF document text
    • https://cdn.sqhk.co/tefupudoma/dTidKEb/repost_for_instagram_apk.pdfIn PDF document text
    • https://rejomopoxe.weebly.com/uploads/1/3/1/3/131383333/cb359af079.pdfIn PDF document text
    • https://cdn.sqhk.co/fofateze/bibjdjc/wokebemibogufix.pdfIn PDF document text
    • https://gumevuwogixuxuj.weebly.com/uploads/1/3/5/3/135317748/wokijidof.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/hage2gi/first_time_pregnancy_advice_sinhala.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d88608a2-be60-498c-9894-be2cb8ba3de8/32370809145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6276fa8b-8d22-472e-9b81-8dc3d81b1cfd/solar_eclipse_2019_ppt.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB04 1584 bytes
SHA-256: 63d04fadcf05537f15bcc7a49a2a2ca7764978d07f0c9c2b62558ceceea1332d
font_01_sfnt_off0000f2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DB 3728 bytes
SHA-256: cc372c59fcf3e023e353afa1d8b418895fccb38bc8e8f2c7c082646d556c019f
font_02_sfnt_off0001001b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001B 5948 bytes
SHA-256: ae68451d4a81bb7da72cd687ea020aba579143eb76b7e28665577766d718d385
font_03_sfnt_off00011450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11450 14980 bytes
SHA-256: 043cf27d5abcb1d08124efaac16cf7a54802c16c6134f8f6f2fe1b0d9b857faf
font_04_sfnt_off000144dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144DC 16516 bytes
SHA-256: 927094c099d0e4dc36eceaccd08a1ac95f738148933c8835ca040844b0c1c669