Malicious PDF — malware analysis report

Static analysis result for SHA-256 968b1fa0f017c7e3…

MALICIOUS

PDF

124.1 KB Created: 2021-03-23 12:03:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 25a4117aab098f473d63cd7d3acaee66 SHA-1: 32ec0963b40cb5aa76af8471410de054e5506550 SHA-256: 968b1fa0f017c7e3c23458d2c96ec243724ee4757b5af9e5d6f37522f24e703e
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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/wix?keyword=response+cost+psychology+definition PDF link annotation
    • http://hookup668.site/dungeon_masters_guild_5etx7pl.pdfIn PDF document text
    • http://sandwichhq.club/how_to_connect_logitech_keyboard_to_macbookjlfwu.pdfIn PDF document text
    • http://usblighter24.site/sample_descriptive_essay_about_my_motherpkt92.pdfIn PDF document text
    • http://zapazereti.22web.org/928019989.pdfIn PDF document text
    • http://barbanapoli.moscow/halo_fall_of_reach_free_online_book6573r.pdfIn PDF document text
    • http://wonder-ita.fun/converting_fractions_to_percents_printable_worksheetsxhc6z.pdfIn PDF document text
    • https://wugoxuvalego.weebly.com/uploads/1/3/4/0/134017666/zusaju.pdfIn PDF document text
    • https://kamukijupekud.weebly.com/uploads/1/3/3/9/133997827/baf67c236.pdfIn PDF document text
    • https://ruzutemeba.weebly.com/uploads/1/3/2/6/132681300/wakuzipepix.pdfIn PDF document text
    • http://ital-girl.space/cells_r_us_calgarypjx6l.pdfIn PDF document text
    • https://ruwawakutiro.weebly.com/uploads/1/3/0/8/130874672/fuwosop-mevizakapi-jedebanum.pdfIn PDF document text
    • http://dnepr24.info/14003445216frn7c.pdfIn PDF document text
    • http://legendarycraft.ru/get_followers_app_download_for_instagramznag1.pdfIn 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/7ed61f59-795a-4aec-9bbd-857f69cc01d1/how_to_access_printer_preferences_on_a_mac.pdfIn PDF document text
    • http://fuvituze.epizy.com/69999470133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4f04a7e-3689-4ccf-b31d-867911375fd6/motorola_baby_camera_mbp33xl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71a3d7f9-812a-4b2a-af8b-c219f4cf3025/53095642453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3da10815-6110-48f0-9cd3-f671c2b8d38e/thomas_merton_zitate_criminal_minds.pdfIn PDF document text
    • http://guligakifiw.epizy.com/wordpress_download_macbook.pdfIn PDF document text
    • http://xolelapideruse.epizy.com/matematicas_financieras_hector_manuel_vidaurri_aguirre_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5082b77b-84bf-401d-ae1b-95b9ba0ab3a8/how_old_is_dell_latitude_e5450.pdfIn PDF document text
    • http://mivoxonewume.rf.gd/alcoholism_ppt_presentation_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDD 62924 bytes
SHA-256: 06f7ecf33f5e0db0bb4bf0837aefd7472895a3c50b5e8595c09e045dc622744b
font_01_sfnt_off0001a9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9C6 5220 bytes
SHA-256: 3e900818fe140aac31a19a75686b2c01c176d98841d0f6ceffea34a217be6661
font_02_sfnt_off0001bb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB9F 11608 bytes
SHA-256: 81ab43fb360311343b18a35111204cd5ceca6459f24d826cc775935df643867a