Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbdb299314abd354…

MALICIOUS

PDF

74.9 KB Created: 2021-03-11 15:55:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d94b6e617487e60d3c21d24ab9e1958d SHA-1: d290ad1349564be5e1bb518186f1a76aa00bacc4 SHA-256: dbdb299314abd35476fc4185b14395c31b30a25e99db9023eca077d17462dd91
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though partially garbled, suggests a lure related to tenant notice periods to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/wix?keyword=current+notice+period+for+tenants PDF link annotation
    • http://zabumufunesomud.66ghz.com/proform_chaponost_69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484805/normal_602ec536be541.pdfIn PDF document text
    • https://cdn.sqhk.co/dolavalof/h9oP1ew/baccho_ka_train_wala_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500904/normal_5fcdb7d55479b.pdfIn PDF document text
    • http://batut.space/83226701016zjpvk.pdfIn PDF document text
    • http://registrat.space/46519186890t054d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460232/normal_600e41a92d2e2.pdfIn PDF document text
    • https://cdn.sqhk.co/lutakakijuro/heEngik/58432489049.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/DpjejbY/diy_face_mask_pattern_for_glasses.pdfIn PDF document text
    • https://cdn.sqhk.co/mamozinuba/eOLlF6O/26817757358.pdfIn PDF document text
    • https://cdn.sqhk.co/niporatibu/hjgjhhb/bichhoo_raja_full_hd_movie.pdfIn PDF document text
    • http://help-igcopyright.xyz/hydroranger_200_installation_manualzy3nz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408583/normal_604400bf4dbcc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vepejatudededok.rf.gd/how_to_read_lowrance_elite_9_ti2.pdfIn PDF document text
    • https://35479656-6a94-44d6-ac55-da507c14a2ae.filesusr.com/ugd/d68318_4e922425e7a44d03a5fb39b823b66a8c.pdf?index=trueIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_20482898ab124f77813ba36492c63197.pdf?index=trueIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_528211595cd748f8afa7fac5e24066cd.pdf?index=trueIn PDF document text
    • http://sufizaj.rf.gd/16014954155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/531f2f38-0842-488e-bce3-e6f3c9344b28/8988810625.pdfIn PDF document text
    • https://d67926d6-99fe-48a4-938f-95006fdf2de6.filesusr.com/ugd/21d82e_ac58c8c59dae41faac8d0145ad6e8e6e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/894f81f1-7cf7-422d-9ff5-9d9d1868e87c/ketudufuruwonup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81163fad-b14a-4720-8cb7-f3f7176f28fd/vinamogotemoje.pdfIn PDF document text
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_3b3ca55677274afea330683d7a781cfe.pdf?index=trueIn 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_off0000eb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB14 5024 bytes
SHA-256: 402cf370bbc04101fccdd33e200457ee9a19f996f9ddb3b802e9201594e427d1
font_01_sfnt_off0000fc35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC35 10000 bytes
SHA-256: cc7e82389f093874ad547903c4614e45f62171ddc7e9a68257e25889b09416d1

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