Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f10f31937c3715c…

MALICIOUS

PDF

77.8 KB Created: 2021-03-28 07:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0173c513c7e533bed2cd7efa8b8211da SHA-1: b96dfb207cda7d958f0ed657f701a12effea372c SHA-256: 2f10f31937c3715c70611bcec08fdf8ea3b5ee19bc345b212f764b7b2b1cd316
166 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, including one that appears to be algorithmically generated and hosted on disposable infrastructure, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains text related to search queries, further supporting the lure of directing users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://lozipotod.ru/wb?keyword=good%20nail%20salons%20open%20late%20near%20me%20on%20sunday%20morning PDF link annotation
    • http://atomlinux.com/pearson_geometry_textbook_answers_page_153bkb6l.pdfIn PDF document text
    • http://nukicew.xyz/us_army_rangers_ww2_uniformmyqwv.pdfIn PDF document text
    • http://ledy66.net/ruwetv4d3z.pdfIn PDF document text
    • https://zogewuvenofo.weebly.com/uploads/1/3/2/6/132683334/pivobaj-bafavawetusa-biwirak.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/20486998433.pdfIn PDF document text
    • http://pubgucbayim.com/what_are_the_different_types_of_light_fittingsrnevl.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/c17257778f61b9d.pdfIn PDF document text
    • http://mpvideo.org/istologia_e_anatomia_microscopicah8268.pdfIn PDF document text
    • https://zamamuxito.weebly.com/uploads/1/3/4/2/134234866/sikerozowupigig_diwobasekoza.pdfIn PDF document text
    • http://streamsweets.com/diarios_de_motocicleta_libro5eh2h.pdfIn PDF document text
    • http://finansi-7.online/dna_worksheet_answer_keyvo4yh.pdfIn PDF document text
    • http://mevixonur.mywebcommunity.org/introduction_to_business_information_technology.pdfIn PDF document text
    • http://goldenframecollision.com/gupefanamusidasemubotalogusqfu.pdfIn PDF document text
    • http://kfcrabota.ru/how_to_clear_memory_on_casio_calculator_fx-82auyh7hg.pdfIn PDF document text
    • http://nadahul.ru/382800926184pchx.pdfIn PDF document text
    • http://abwaab.su/sijinetesamolizemunozoopv4c.pdfIn PDF document text
    • http://thrivewebs.com/40819624412ngutt.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/20bcf5f5-4cdf-4cda-a27f-2e20ad7f9840/73572954059.pdfIn PDF document text
    • http://panexorumilogim.myartsonline.com/verbal_communication_definition_and_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cf98d31-50d3-4a11-be24-ff2bfb10991c/88039353045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24ef185f-0630-4cdc-a7d3-ff78d3a3be97/washington_football_team_new_name_news.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf61bd2f-db5c-4fdd-aa5c-c76d5ca89cb8/aashto_road_design_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/297f0d4a-e92f-4f72-b34c-755696824983/94327245412.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_off0000f193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF193 5412 bytes
SHA-256: b1c0761a540be06b7b944a6e1372bea34a05029780bbf0070f442e5bf376cc98
font_01_sfnt_off000103f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F5 11056 bytes
SHA-256: 2c3642be9ca1ad7213bfd6dcb8accbb62344bee69653ca238c885a8cb467fc63