Malicious PDF — malware analysis report

Static analysis result for SHA-256 40aa96ac372148bf…

MALICIOUS

PDF

71.6 KB Created: 2020-12-06 15:07:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b175a0c11c2d4a5fd065cf9d6d67f99d SHA-1: de94382894d1f88d2539ef1dd326fb3f6cae2b41 SHA-256: 40aa96ac372148bfabe0118147f95dba1f4ff1a367853147071ca7520b0013ad
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/123?utm_term=the+royal+ranger+book+2+pdf+weebly In PDF document text
    • https://cdn-cms.f-static.net/uploads/4419433/normal_5fbd55e49860f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447450/normal_5f9de895a10d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385887/normal_5fa52f864bdbe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446490/normal_5fc5a03100f8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383160/normal_5fb5cbf5a1ece.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408584/normal_5fcc09b5a5b22.pdfIn PDF document text
    • https://bodadesoka.weebly.com/uploads/1/3/4/2/134234706/4389886.pdfIn PDF document text
    • https://nugaramavamog.weebly.com/uploads/1/3/4/3/134320686/mepapokesanixuki.pdfIn PDF document text
    • https://tuvaruwa.weebly.com/uploads/1/3/4/7/134711775/5cbd0f475ce1.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/3e75a4e696b2f2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407997/normal_5fb2c9a62a95a.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://static1.squarespace.com/static/5fc5b65d6609fd0ee7b27781/t/5fc9cadcfedaa13a486317ba/1607060193045/sakhi_movie_ringtones_free_download_telugu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf2e41af5bf52c326763b/1606218468855/going_from_standard_form_to_factored_form.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2d8a416f6d44b07cb59c1/t/5fc8099650c7b33622e93a53/1606945174337/shadow_candy_jumpscare_gif.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEB 5264 bytes
SHA-256: 81ed8e4f290154bd65b9dab5b87339331d5505d1c14a62dafa58faae787b6777
font_01_sfnt_off0000dddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDB 10928 bytes
SHA-256: e901ee122d379beb80fe4bf9bd5b903ad12c39e45e364799669f038f419cabd8
font_02_sfnt_off00010335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10335 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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