Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0c9b65cbb7f4ea0…

MALICIOUS

PDF

80.7 KB Created: 2021-03-03 21:29:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: dd317c792fb1ccb06d7a5e085c89926e SHA-1: ef975e6ead9d818ebf4a5ffe487ba1165601f349 SHA-256: a0c9b65cbb7f4ea020a9e2ab835b0f00b79961527e0a0d8d3cbfacc5ba1d9125
126 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting a distribution mechanism for malicious content. The document body, though heavily obfuscated, contains text related to free PDF downloads, aligning with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=meen+rashi+baby+girl+names+in+gujarati+pdf+free+download PDF link annotation
    • http://akmurzina.com/twilight_saga_new_moon_full_movie_free_download_in_englishjix85.pdfIn PDF document text
    • https://mafenipo.weebly.com/uploads/1/3/4/8/134879688/vosuvozu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379614/normal_5fdd0f804a736.pdfIn PDF document text
    • http://nazhivy.net/how_often_do_marines_run2qbx1.pdfIn PDF document text
    • https://risimapi.weebly.com/uploads/1/3/4/3/134321435/a3658f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384652/normal_5fff6a99801ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481270/normal_60396b9c09909.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486748/normal_602d7300145f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413862/normal_6008fc8c1ae66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368770/normal_5ff287af16b1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486521/normal_601f9f6f721a6.pdfIn PDF document text
    • http://mkr-olimp.info/what_are_the_benefits_of_a_vibration_machine78iys.pdfIn PDF document text
    • https://sabigojepesadiz.weebly.com/uploads/1/3/2/8/132814096/901894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393644/normal_603069de4a8ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451206/normal_600ff50596085.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://vijixekezej.rf.gd/mxico_creo_en_ti_poema_completo.pdfIn PDF document text
    • http://jewulepip.epizy.com/51614736863.pdfIn PDF document text
    • http://jepitatumezelo.epizy.com/what_are_the_examples_of_operating_system_software.pdfIn PDF document text
    • http://katutexe.epizy.com/jon_duckett_html_and_css_review.pdfIn PDF document text
    • http://sosodif.rf.gd/amir_khan_song_chan_mahiya.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_off0000ef24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF24 5752 bytes
SHA-256: 94923992d072fba364393a67370c86bd9c8cf116a13f62a0dcf672ee878d7d93
font_01_sfnt_off0001029b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029B 10712 bytes
SHA-256: 8320bcc6ad194c6605e0e6acb19b00b6bf4a4ee5b45920e7e27714442917be1a
font_02_sfnt_off000126ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FF 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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