Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc33f6d9fd75e3f…

MALICIOUS

PDF

74.4 KB Created: 2021-04-02 12:26:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1b6d62efe9c96528a882cad0df9a19a8 SHA-1: b1b8f20cd84565f2ace0cb69b09becef110b4c32 SHA-256: 7cc33f6d9fd75e3f9b0be0d58d869f54927fca7d89f179a40fdcbf48407e9695
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links pointing to known malicious redirector infrastructure and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent, likely to redirect users to a compromised site.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=urology+pocket+guidelines In PDF document text
    • http://healthytrands.com/56504540499uxw3n.pdfIn PDF document text
    • http://faxagigotitij.66ghz.com/zutewin.pdfIn PDF document text
    • http://ludivabuka.iblogger.org/60886737526.pdfIn PDF document text
    • http://lodijijewotiviw.iblogger.org/72058928659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385427/normal_605fbae7e0d4d.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/2005_harley_davidson_sportster_1200_custom_service_manualfkmmi.pdfIn PDF document text
    • http://snegny.com/88811128666smeja.pdfIn PDF document text
    • http://xibijawex.iblogger.org/diffrence_entre_cellule_eucaryote_et_procaryote.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393755/normal_5fe434f66b8d1.pdfIn PDF document text
    • http://dazomasuw.22web.org/youngblood_band_sheet_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477623/normal_605dd8357add6.pdfIn PDF document text
    • http://seruvirokanajo.iblogger.org/59204014522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461511/normal_605fc106913c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_601ed2ede156b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/which_receptor_is_used_to_sense_the_taste_of_food.pdfIn PDF document text
    • http://wuxekijonudi.epizy.com/coming_soon_html5_free_template.pdfIn PDF document text
    • http://jopiwutipav.epizy.com/kuvajif.pdfIn PDF document text
    • http://mejesikiwabez.epizy.com/37628449080.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/97867752532.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/contoh_berita_depth_news_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/somepogokapavixej.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE512 5188 bytes
SHA-256: 51dbab323c0fcd99a7e04918b4570b2a63b06b079d4531f9cc4e340bd96bdeb0
font_01_sfnt_off0000f6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D6 10540 bytes
SHA-256: f1af00a5a67e31f3993893a33a4af71dd94d7e9839c210ba9a884b70cee86ec8

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