Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ac3b27fe2f80d9…

MALICIOUS

PDF

76.3 KB Created: 2021-03-13 15:03:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 003c18fe73ab482de16c6f78943a7019 SHA-1: 7deca87e109ae4a5d99aaf58044a413481dfda4c SHA-256: d0ac3b27fe2f80d998b9e14a2193ff71052f792e7e538299561c4077546e8ec5
186 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many URLs pointing to disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest the primary function is to redirect users to malicious sites.

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://dugedepap.ru/123?utm_term=assistant+project+manager+resume+pdf PDF link annotation
    • http://nudistoff.club/hs_mini_maxx_hot_damn_tune_6.7_powerstrokejo3a9.pdfIn PDF document text
    • https://bujozimadepaxed.weebly.com/uploads/1/3/4/6/134615651/sobefanatobarim.pdfIn PDF document text
    • http://vitrinachel.ru/37076204695lqh41.pdfIn PDF document text
    • http://clientbluebadge.com/jeep_grand_cherokee_repair_costsyfsl6.pdfIn PDF document text
    • http://wordsidepost.top/how_do_you_get_a_double_dapple_dachshundjnkyj.pdfIn PDF document text
    • https://rakevuxex.weebly.com/uploads/1/3/4/0/134040666/1206840.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/algebra_with_pizzazz_did_you_hear_about_page_103_answers.pdfIn PDF document text
    • http://mitatizizuje.mypressonline.com/how_to_clean_airbrush.pdfIn PDF document text
    • http://ludshop.xyz/zobutirifelinomuli17fty.pdfIn PDF document text
    • https://guxovegetixewaz.weebly.com/uploads/1/3/2/3/132302910/7019147.pdfIn PDF document text
    • https://ribupawotomimam.weebly.com/uploads/1/3/4/6/134694318/wokan_verizigelin_lisasorenobiru_femeletadalud.pdfIn PDF document text
    • https://nulaxevaximuji.weebly.com/uploads/1/3/0/7/130776814/vejopupudokufew-fanovojopan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_49447435e4b347519534f32995858b4a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/trailhead_salesforce_modules_answers.pdfIn PDF document text
    • https://83f018a0-8e49-44f0-b57e-805e464a5f06.filesusr.com/ugd/10a4aa_5905a1920486483a9061931d904a4c74.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mavixu/jevume.pdfIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_0b1b19c99cf34153b78b5f5af2c61595.pdf?index=trueIn PDF document text
    • https://48b7024d-7414-4593-b44d-ed892b96ad15.filesusr.com/ugd/3e5db3_c531438ff1714574b65cf9f9ddf230bd.pdf?index=trueIn PDF document text
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_52678d94c97d4c10affca61ea4325d1b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/aptitude_questions_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/celery_stalk_nutrition_information.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_off0000eca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA2 5508 bytes
SHA-256: f6881eb6480a35b9374aa298580409035e5ca541f0ef793776d581337d3da969
font_01_sfnt_off0000ff4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4F 10860 bytes
SHA-256: 27d1478935b503926616afbd6b894a2fc81224b0a24d65e435ef27402c9d8423