Malicious PDF — malware analysis report

Static analysis result for SHA-256 1119a1732fd71123…

MALICIOUS

PDF

111.4 KB Created: 2021-03-24 12:13:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3da5e959b1f80727e037dcbdc8d5d536 SHA-1: 743077c2a66bee270ba3c93503b142fa9a8e9da1 SHA-256: 1119a1732fd7112389899939ba4505eae291a15069a617e64f85e05cf1d2b1d5
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains numerous embedded URLs, many pointing to disposable hosting, and is structured as a link farm. The primary URL, 'https://fokemale.ru/wix?keyword=science+olympiad+water+quality+rules+2020', suggests a lure to a content farm, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure and URL patterns are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • 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 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://fokemale.ru/wix?keyword=science+olympiad+water+quality+rules+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413866/normal_5fdbb7a5d4a95.pdfIn PDF document text
    • http://ponaxamewimenul.sportsontheweb.net/hey_jude_partitura_sax_alto.pdfIn PDF document text
    • https://fumaletaseker.weebly.com/uploads/1/3/1/3/131381433/5d1266c1a0ffd8.pdfIn PDF document text
    • http://lebofawudire.mygamesonline.org/somatization_disorder.pdfIn PDF document text
    • https://sumajodezidozi.weebly.com/uploads/1/3/3/9/133997227/fedijeva.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/mojifoji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456379/normal_5ffe1e7637e98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455185/normal_5fd97879599f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385869/normal_5fe3104f0a49b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387698/normal_6012f414309a6.pdfIn PDF document text
    • https://jupavovol.weebly.com/uploads/1/3/4/3/134314217/vorodinewe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471960/normal_5ff1590c16028.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488842/normal_603f086bb0ebb.pdfIn PDF document text
    • http://buwovavozu.getenjoyment.net/a_byte_of_python_russian.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404514/normal_603e6598f0990.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481408/normal_5fed4d34af991.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/fimolerite.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379851/normal_60507dcc24c89.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
    • http://rosajeku.myartsonline.com/97869226790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc12b241-5de7-4b4f-93c2-22ab3f3a9c30/92712122891.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/advanced_engineering_mathematics_by_rk_jain_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2475f3c-125a-4ec0-9000-078b2138383a/bosezoletes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86c04b6b-fabe-48ab-b000-1366e4a4816c/how_to_charge_petsafe_dog_collar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5528b78e-0b76-41f1-a7c9-e31eee3b3394/1536566043.pdfIn PDF document text
    • http://gipetiwivi.atwebpages.com/fefafirimeton.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_off000163ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163FF 5800 bytes
SHA-256: 72533fc29d31c587f8811ed10855f616b313633566ab0c7903e6a375614fae12
font_01_sfnt_off000177a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177A3 11972 bytes
SHA-256: 4fb9a1cd33bed0c37995eddb4ce7c43f89ce89ecb37f4fd8f4551cbd2aa9070b
font_02_sfnt_off0001a023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A023 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378