Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ca903fb7077dad…

MALICIOUS

PDF

80.8 KB Created: 2021-03-27 19:36:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d3ef81ca0789c0f7387dd8571ddd6d35 SHA-1: 359fcdc04f3a07b33dd1917ebddf8d1af8fc6139 SHA-256: 53ca903fb7077dade60801c4cd1bb9eede6b95f38c150e0025d0565b8e43688b
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary one pointing to 'lozipotod.ru', which is flagged as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the document's structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/award?keyword=vastu+shastra+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449205/normal_5ff4e024261c7.pdfIn PDF document text
    • http://riniwodifole.medianewsonline.com/how_to_repair_pressure_washer_turbo_nozzle.pdfIn PDF document text
    • https://fimulumalopa.weebly.com/uploads/1/3/5/3/135326017/409379.pdfIn PDF document text
    • https://sitepofom.weebly.com/uploads/1/3/1/4/131438718/vafumisidazuz_viluvutagasimu_bezup_sunup.pdfIn PDF document text
    • https://tezijiso.weebly.com/uploads/1/3/4/6/134690371/467770.pdfIn PDF document text
    • http://mitatizizuje.mypressonline.com/field_cancerization.pdfIn PDF document text
    • http://musc-media.xyz/ditodetofukowavogutobijasz8jh6.pdfIn PDF document text
    • https://kexufufebir.weebly.com/uploads/1/3/2/8/132814170/378082285.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489852/normal_6011ba51a0756.pdfIn PDF document text
    • http://bellissimo.online/52237288357pkvds.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_6042f98aebdf2.pdfIn PDF document text
    • https://wewodagib.weebly.com/uploads/1/3/4/2/134266566/195bb64.pdfIn PDF document text
    • http://texoraw.sportsontheweb.net/14830969238.pdfIn PDF document text
    • http://kujunat.medianewsonline.com/padopamivuwoxu.pdfIn PDF document text
    • http://vbruti.site/kipirafibogidewopjki0a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/best_android_puzzle_games_of_all_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/713fadaa-de7d-41f5-a6f4-b8dbf1c364b4/concert_fortnite_to_month.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55951f8a-3de0-4157-a2cb-863f92507254/sjcam_sj4000_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/webapomuto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e50c14f3-9bb9-49bc-a92d-312547282d8c/logitech_g900_chaos_spectrum_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6d4d7b0-9038-4ca7-946c-83634ba43aab/introduction_to_data_science_a_python_approach_to_concepts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e120c8d-df8b-44e3-a957-fb35bcac38c4/gegalidewo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF4 5184 bytes
SHA-256: 6e4cf1c3935f1e88a04a33e65fe334a03e8c62433135f8a95f81190a90afed53
font_01_sfnt_off0000f1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AA 10952 bytes
SHA-256: b867ea96e2cdb1907ffa4a83080ed8754f916ab88e82f2c4a245cc9e29a51dc3
font_02_sfnt_off000116a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A9 2072 bytes
SHA-256: 6604906041fe88dfbc261020bd84c9eeb32576ef8eacd169324117eca247b9cb
font_03_sfnt_off00011fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAC 16172 bytes
SHA-256: fb36930b6158726aadc5cec8e2937717261789c1ed468292f33a1ffb1951f124