Malicious PDF — malware analysis report

Static analysis result for SHA-256 778bf62874198d2f…

MALICIOUS

PDF

81.1 KB Created: 2021-04-02 07:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bee71f705ff97453e4684edfd8929753 SHA-1: 4e2a13edf0d3544596fd85c5d6abe71bca2250dc SHA-256: 778bf62874198d2f54ba03b6c7c9ac8f12b8adad432b4af05dd125f4a4333ce4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/award?keyword=galvanometer+to+voltmeter+pdf PDF link annotation
    • http://kuvenumine.mygamesonline.org/asuhan_keperawatan_bronkiektasis.pdfIn PDF document text
    • http://valuburikodajad.medianewsonline.com/wodareb.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/gonaxevuweveba.pdfIn PDF document text
    • https://cdn.sqhk.co/dagosasojo/xLLjcR0/bidotinimaridolarubelavu.pdfIn PDF document text
    • http://voyazh-shina.com/68374004604xp4qs.pdfIn PDF document text
    • http://trysucre.pro/how_to_find_angles_measures4i2f3.pdfIn PDF document text
    • https://cdn.sqhk.co/nebemina/geTiiic/star_wars_the_old_republic_3d_models.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/what_is_included_in_an_executive_summary_of_a_business_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/e1je28V/nikurenimepetib.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/hficijE/75092553767.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/0feae2c6-7583-472a-b296-3f29b938e309/zivapotagirugebe.pdfIn PDF document text
    • http://totefopige.atwebpages.com/nekefufetonugubuzuwobero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf06e11b-117e-4c97-9978-573bb3d3e680/how_to_write_summary_in_ielts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad8a234-f25d-4dfe-b8e7-ba1a1167f50b/t_fal_optigrill_chicken_breast_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53294a09-7852-4721-866c-866cf5b9e939/what_is_the_stress_scale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88d26ab9-17d3-4354-b5c5-a1bbf6aefbf0/buxusudivadawugaronulaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/605a1535-9017-4017-be60-f9374df26421/40772280802.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_off0000f303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF303 4840 bytes
SHA-256: 1244866d5e87b32b2dc428d6ebba94e603d649ed10e7bb967dfc082be489a62e
font_01_sfnt_off00010369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10369 10796 bytes
SHA-256: 5023f831b12ef9d1dcf1e206d3ff8bcd5a8c135149585967f91f14ccd0b6412a
font_02_sfnt_off00012897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12897 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.