Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ce66677105a85a…

MALICIOUS

PDF

90.3 KB Created: 2021-03-24 11:33:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1aa4955a9ff89a38b0829e52f29238a7 SHA-1: c11a03ceb01b4034c43c1e637ae10f148c66a39b SHA-256: 82ce66677105a85a2f9f7d454d7325f29022d6492b7c67e5961de8066620498a
136 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure, specifically using an image to redirect to an SEO redirector. The primary malicious URL identified is https://nipisod.ru/award?keyword=annexure+e1+hssc+pdf. While no scripts were directly extracted, the PDF structure and the nature of the redirect suggest an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://nipisod.ru/award?keyword=annexure+e1+hssc+pdf PDF link annotation
    • http://sitebomobegux.sportsontheweb.net/47075745902.pdfIn PDF document text
    • http://gamowenugeg.sportsontheweb.net/pumozolebitarolofaridago.pdfIn PDF document text
    • http://lisilagitani.22web.org/static_or_dynamic_character_book.pdfIn PDF document text
    • http://tarekupi.scienceontheweb.net/bsc_3rd_year_zoology_syllabus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/simpson_pressure_washer_hose_50_ft.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/meenakshi_college_application_form_online_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/macbeth_by_william_shakespeare_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37b1151a-6b30-4646-a08b-6c9a59232f68/2016_honda_civic_cvt_transmission_fluid_change_cost.pdfIn PDF document text
    • http://xeroxuzowi.epizy.com/42786338404.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/bafunil.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/postman_extension_for_chrome.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/1080p_wallpapers_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/where_is_the_lint_filter_in_a_washing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/4849607860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c553c1a7-9fd1-4a56-a156-1aab6e611afe/dilusapodamab.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/26143760862.pdfIn PDF document text
    • http://jijetesak.rf.gd/why_is_parallel_structure_important_in_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/92955367594.pdfIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/fabadazuvugetopid.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/spartan_6.4_dpf_delete_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/81911002489.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C7 5108 bytes
SHA-256: d16bd4fc799011ca2599199417ef5a61ca5ab58d1f4c2648cb2fddbbe2356ce3
font_01_sfnt_off00010232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10232 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off00010d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D95 10616 bytes
SHA-256: 61323a62d8eee352b3090a0796d4bba571e408c7115824d99312c6a8f26fc1f0
font_03_sfnt_off0001321e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1321E 12896 bytes
SHA-256: d76f2e6802d534ec9163124c6dce04132ade34f93d6f5efa2e7972e05fc4a5cf