Malicious PDF — malware analysis report

Static analysis result for SHA-256 860bee61e73de33e…

MALICIOUS

PDF

80.3 KB Created: 2021-03-19 20:45:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 14d07f48fb261fdb02ecb7d59951245e SHA-1: 5f487ea10282e5bf3954d798ead8681bde901fab SHA-256: 860bee61e73de33e2b35a82ab6dad6643a72516e7f05e1d9192d11ecbc94265a
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common phishing lure, likely leading to a second-stage download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/wix?keyword=peer+review+lesson+plan+high+school PDF link annotation
    • https://jomigotub.weebly.com/uploads/1/3/4/7/134748998/sezegi.pdfIn PDF document text
    • http://jijimaxugixu.22web.org/segaloxe.pdfIn PDF document text
    • http://salufogi.iblogger.org/82519749658.pdfIn PDF document text
    • http://vumogegotawugub.mypressonline.com/niteranugafolelerigi.pdfIn PDF document text
    • http://xuwajofona.iblogger.org/gonepenugemojopo.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/76094949377.pdfIn PDF document text
    • http://vivofuma.66ghz.com/faxotipulinasilerafojaz.pdfIn PDF document text
    • https://waxitajoxozaner.weebly.com/uploads/1/3/4/4/134474673/zumepesinula.pdfIn PDF document text
    • https://faripolugariwel.weebly.com/uploads/1/3/1/4/131453512/75ccde9d2.pdfIn PDF document text
    • http://zitalogeloluwiw.mygamesonline.org/positive_spirit_body_mind_and_soul.pdfIn PDF document text
    • http://rozewevojalel.sportsontheweb.net/inter_ethnic_conflict_in_ethiopia.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
    • https://uploads.strikinglycdn.com/files/97225b27-33b2-4f47-8c47-95a5e581fe27/posubexev.pdfIn PDF document text
    • http://nuzavaxevarap.epizy.com/adjust_flashlight_brightness_android.pdfIn PDF document text
    • http://pububuvugesi.rf.gd/how_to_get_spirits_in_smash_mode.pdfIn PDF document text
    • http://jozolefifove.epizy.com/covey_principle_centered_leadership.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/059fa29b-54c9-4e26-a564-b768b40b1b85/zabupajesewenivexijamunek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9db3b677-9e36-4695-b9f2-e1f984238aa8/motozoxejupo.pdfIn PDF document text
    • http://dufogatate.epizy.com/acalasia_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/613a807f-b4ad-40d3-9e58-191d5f6f345b/how_often_to_do_knee_strengthening_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3f3629a-341c-4969-9521-43b6802437ec/dragon_ball_super_full_color_manga_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a865b9e2-f5e8-4af7-ae01-b9cfb4a5ab23/foxit_editor_software_free_download_full_version_with_crack.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_off0000f134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF134 5056 bytes
SHA-256: 9c12256bd3016b9c9b3ffce0524360e21e265ae427237078b067bd3b46090fac
font_01_sfnt_off0001025e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025E 10404 bytes
SHA-256: 53cbf3fbf49b3ce58a5ce6ec6dd8dba56d8480282ff7b66ec3c59b8732d841a0
font_02_sfnt_off000125df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DF 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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