Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e09da874553c8c…

MALICIOUS

PDF

77.0 KB Created: 2021-03-17 22:47:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a7465738837e041a88989e3155b5ce7a SHA-1: df5d06c5e110dd89e9b3a22326ca03bac30812e0 SHA-256: 02e09da874553c8cc490f6474c9a4079dff36aa3fe1c17c2e8ebb44e8f3607c0
254 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to redirectors, suggesting a phishing or content-farming operation. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate the document's primary purpose is to redirect users to potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://yafferge.ru/wix?keyword=warframe+orokin+vault+solo+guide In PDF document text
    • http://remipav.22web.org/astonishment_report_definition.pdfIn PDF document text
    • https://genaxixa.weebly.com/uploads/1/3/1/4/131437685/c4cc20596b.pdfIn PDF document text
    • http://fosakilatugok.iblogger.org/bad_boy_records_contact_information.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/iagdqr3/call_pakistan_number_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nodezaneripe/eB9KGGf/14303921207.pdfIn PDF document text
    • https://jotabejomunumog.weebly.com/uploads/1/3/0/8/130813846/f3b9f01d0a7b.pdfIn PDF document text
    • https://dejokorakas.weebly.com/uploads/1/3/1/3/131379117/6491624.pdfIn PDF document text
    • https://xigokujote.weebly.com/uploads/1/3/4/6/134649591/6703719.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/gurupixabogivaz/bijukinusafexu.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/camera_shots_angles_and_movement_lighting.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/tekken_3_game_install_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/green_screen_background_effects.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61138d27-6c39-409f-aa32-f40b0b40ce3c/nordictrack_exp_1000x_treadmill_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9827ada-ea53-4fe4-a984-b8cb34222bfb/fifty_shades_freed_movie_ending.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/lubumip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/231d2f2d-23b5-48ee-9095-105bc2a38798/mebikovivirapumudugiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f41b824-2bf5-4131-ba44-a2fae9994ac7/bassham_critical_thinking_a_students_introduction_5th_ed.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/45529558277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d694c6e0-9f3f-4227-a99f-50fc50d96f27/black_and_decker_cordless_drill_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/deep_impact_full_movie_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/plautus_amphitryon.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_off0000f06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06C 5364 bytes
SHA-256: 1c577d2a8ae18973390da16a794aea33f6a39e07da0bc66f1f29f2729f02e476
font_01_sfnt_off000102ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AB 10528 bytes
SHA-256: bfe4881b398e70b70f24e2573ac82feebbe4eee49709876993e8974896de3b2b