Malicious PDF — malware analysis report

Static analysis result for SHA-256 199b26482313ba09…

MALICIOUS

PDF

74.5 KB Created: 2021-06-04 21:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 03677c0549039679664ffcf2b0528795 SHA-1: 97e4a8971f26ffede68fcadaf46c104ce0e88d5a SHA-256: 199b26482313ba096231957f69a5add54023fbf01b6f839f14df40cd39f5359d
226 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many hosted on disposable domains, forming a link farm. The primary link, disguised as a worksheet, leads to this farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to distributing further payloads or leading users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://smidgel.ru/pbw?utm_term=animal+cell+color+worksheet PDF link annotation
    • https://tigisara.weebly.com/uploads/1/3/4/6/134651617/dulokewa.pdfIn PDF document text
    • https://gawinageriju.weebly.com/uploads/1/3/0/8/130874076/3319500.pdfIn PDF document text
    • https://gomibabojusul.weebly.com/uploads/1/3/1/4/131483197/gosalovepebisoxe.pdfIn PDF document text
    • https://magijomolalol.weebly.com/uploads/1/3/1/4/131437319/4582554.pdfIn PDF document text
    • https://xupazipul.weebly.com/uploads/1/3/5/3/135325103/dodijivunasis_murag_wamotujub_gifezulisijid.pdfIn PDF document text
    • https://birakegisepes.weebly.com/uploads/1/3/4/5/134597855/pedagukoze-wenenu-bugazakume-wuzipamov.pdfIn PDF document text
    • https://sojabejob.weebly.com/uploads/1/3/4/8/134890412/vuxifanirazanaf.pdfIn PDF document text
    • https://gebovobavafol.weebly.com/uploads/1/3/1/4/131406715/7a78f9.pdfIn PDF document text
    • https://mobunotenu.weebly.com/uploads/1/3/4/4/134403581/pufuwuwenubuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/80fe4668-e041-4bf9-a78f-81e7d16ccd96/toxaziferuzajepevazuresur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fe7a20a-5eb3-42b0-a120-6239119109bd/52259735724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e49abd55-af35-4844-be5c-74e5e6fea67a/how_to_hack_pes_2020_without_human_verification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b9e2d78-3506-46c2-aeb4-01b4abcd1a2d/how_to_use_100_chart_for_multiplication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5fef2a8-3d03-49db-9186-663d77cdac18/wewonulij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/209136b7-1cda-49cc-bfbd-794cb845aeee/imagen_de_carita_feliz_animada_para_colorear.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00a74225-0674-44f0-aaa9-548937450341/how_do_deep_breathing_exercises_work.pdfIn PDF document text
    • http://podimil.pbworks.com/f/adjectives_and_verbs_with_prepositions_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/776fccb4-6f34-4198-9609-c00725d3370a/free_rar_password_unlocker_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/924a3f03-8865-4735-bc72-2976fe7a374e/50526622200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f71de347-9468-4966-94a4-aee67b6e3406/63624806030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ff32f46-c218-467d-bd75-7c1445e18604/how_to_use_the_format_data_labels_task_pane.pdfIn PDF document text
    • http://jobagej.pbworks.com/f/fashion_story_hack_apk_download.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_off0000d95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95A 4972 bytes
SHA-256: 6eb7eccb393ffd0c48f26bda8c70d917ee89954dca019cdf30e2ed9ce9378325
font_01_sfnt_off0000ea0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0C 10632 bytes
SHA-256: 8230d5451fed8fe6a283624a10ee2771e933499f621950ecc2a3cd657f0c4bc1
font_02_sfnt_off00010eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAA 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361