Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c6622f8da389831…

MALICIOUS

PDF

102.9 KB Created: 2021-03-14 06:12:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: b04208bf110fa0682d5171bfc7a04b1e SHA-1: 1c00d70677a44ba590d89fd47eadaae2386d8fb1 SHA-256: 6c6622f8da389831fe96380d684981688b35e35725e52d5e6998d60eed8d43cf
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a primary link to 'lozipotod.ru' disguised as an educational resource. This pattern is indicative of a link farm or phishing attempt designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • 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/award?keyword=learn+english+grammar+step+by+step+pdf+in+marathi PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388276/normal_5fff0d7f5b8a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443595/normal_5ffb1451f0e03.pdfIn PDF document text
    • https://napajudiweji.weebly.com/uploads/1/3/4/3/134316113/a077be1d.pdfIn PDF document text
    • http://rikumoturukeju.iblogger.org/classification_of_antibiotics_based_on_spectrum_of_activity.pdfIn PDF document text
    • https://mamumudud.weebly.com/uploads/1/3/0/8/130814078/gebizi_xexamuxoribuvo_dobinenunebavit_fukipamoki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408879/normal_602cb1696d22c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424981/normal_5fc7af44776a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410199/normal_6004a98032e11.pdfIn PDF document text
    • https://weraxugunelega.weebly.com/uploads/1/3/4/7/134719696/padeposuwuvul_supibunasafape_bamuzisaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379613/normal_60336003abff4.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://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/10ef0e06-a58b-476f-b71a-1cc69579f056/husky_30_gallon_air_compressor_parts_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/sodiloled.pdfIn PDF document text
    • http://gizogebinide.rf.gd/nudowigitasetu.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/79634049589.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/68277654678.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63b84d39-2237-4a6a-90f5-4df303852159/how_many_pages_does_dork_diaries_3_have.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA94 5316 bytes
SHA-256: 0ae5af726bbd9e9f8cf58a171ac024ddbd29cf16af4493c16434cb79f3155f8b
font_01_sfnt_off00010c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C68 3056 bytes
SHA-256: 1981be102a55c29e41e4993dd36ede6063b468a10ee11872ca1b35e2506394a5
font_02_sfnt_off0001193d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1193D 10456 bytes
SHA-256: 3cda9ae3f8ad8b61830c26d117c9dcb841f10354ada1dc17e309cfa5349e9a29
font_03_sfnt_off00013d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D12 16088 bytes
SHA-256: 2727b978b38a50f39ad898ebf475f8e8b5e599e3ec01ea6686db683a475b2ff9
font_04_sfnt_off000151c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151C6 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
font_05_sfnt_off00015fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FC8 13940 bytes
SHA-256: 2da7fc2c9a67485872a919bc735d5ade32fa4585f4c0ad7fe59c06e5a4fda858

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