Malicious PDF — malware analysis report

Static analysis result for SHA-256 e369f072eba0f36f…

MALICIOUS

PDF

83.4 KB Created: 2021-03-22 23:26:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: be8711478d9dea5fcce8a098dec4f809 SHA-1: 11ec9fab809e7f14cb762265393f4c12fa7edfec SHA-256: e369f072eba0f36fbc446a45296087cccd04a7037c4705c8e357122e93d00656
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://crophysi.ru/wix?keyword=softkey+root+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412780/normal_5fe9f49c686d8.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/bosch_series_6_silence_plus_dishwasher_manual.pdfIn PDF document text
    • http://enots.space/como_recargar_tarjeta_ais_desde_mexicovfo9h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467004/normal_5fe50af920d02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420610/normal_60255f920ea48.pdfIn PDF document text
    • http://luxomozuk.mypressonline.com/abm_applied_economics_cg_4.pdfIn PDF document text
    • http://dihtyar.online/who_is_still_alive_from_the_cast_of_white_christmasjl62m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377706/normal_605804a28029f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463554/normal_6013a6159d474.pdfIn PDF document text
    • https://salobomuxalevi.weebly.com/uploads/1/3/1/0/131070078/afeb9cdedd2.pdfIn PDF document text
    • https://xukifunizagopo.weebly.com/uploads/1/3/4/0/134013279/barozusaro_rezesew_masiwosa_rodoremazux.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/24571545936.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410030/normal_5ff8ab34e694c.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/aws_exam_questions_and_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393762/normal_604ecd202532e.pdfIn PDF document text
    • https://zebaraxofalolal.weebly.com/uploads/1/3/0/8/130813897/defovadop.pdfIn PDF document text
    • https://fakivafepupu.weebly.com/uploads/1/3/0/8/130873921/9875380.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/2852696.pdfIn PDF document text
    • http://italdom.fun/xujakomivukipfajxv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d1b6e24-a09a-40bc-ba2b-d694c8377449/worifinak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45c9bd7a-7145-4e22-bd8d-6f32edf7fd18/how_to_reset_my_rca_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dec7f001-547f-4e17-97fc-0be846f95739/books_like_uglies_by_scott_westerfeld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69cbe234-297f-46dc-807a-c21460c1e066/89518658768.pdfIn PDF document text
    • http://patudesaruvob.atwebpages.com/48623528158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10193160-efcb-4240-90df-17caa649e452/activity_books_for_8_year_olds_india.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_off0000de9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9D 13248 bytes
SHA-256: a0bd385f6218b3e82c5cb772d2d274406a026a1cf011f2ae324284a5683abe4e
font_01_sfnt_off0001095d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095D 4956 bytes
SHA-256: 5d89fe7fa16c51389d3b3489550e59186403c516334df67c8cf6e8ff4bca88f8
font_02_sfnt_off00011a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A59 10752 bytes
SHA-256: 415142a71ef4b09f7e20f95489cd56ddf396cc24095f923edf4b23c8d7b260a9