Malicious PDF — malware analysis report

Static analysis result for SHA-256 adaa009c6fff407a…

MALICIOUS

PDF

98.0 KB Created: 2021-03-24 22:47:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 54a0b28a08bb1dff7a58e679bc82e006 SHA-1: 552f09a821d06a440c428ca72dc721dfea8ade8a SHA-256: adaa009c6fff407adc998d26a350ec928da1e78619856a4b6b3b8f12cb42784e
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://fokemale.ru/wix?keyword=broken+isles+flying+guide PDF link annotation
    • https://jonolepazom.weebly.com/uploads/1/3/4/5/134520471/xoxebuboxizeganibux.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/11975474823.pdfIn PDF document text
    • https://fuzewejobedogu.weebly.com/uploads/1/3/1/4/131482867/7154441.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/themes_in_literature.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d49cfb27-1eb0-4bff-8adb-da43448fe745/51763929958.pdfIn PDF document text
    • http://vavadot.onlinewebshop.net/nationalism_in_europe_class_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83c22e0a-8997-4b32-8ccb-02122e9c517a/elite_eaf-1506d_digital_air_fryer_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97e5d0a5-7e69-442d-9317-af3b5d1f1850/what_is_the_best_exercise_for_glutes_and_thighs.pdfIn PDF document text
    • http://bilofudako.onlinewebshop.net/antologia_del_terror.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/roland_spd_30_price_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf5b25a9-2591-43af-a7f7-a740f79b1119/walt_whitman_high_school_counseling_website.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b7bc33-53fc-4eb4-8ecb-ea786ef64a48/how_much_does_it_cost_to_neuter_a_cat_in_south_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb543036-9801-4382-ba1b-58aa769afe24/stiebel_eltron_tempra_24_plus_wiring_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/gta_san_andreas_cheats_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5990061-78a3-4df1-b113-cd8cb5abf608/harley_davidson_service_center_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5ab2a0e-dc5e-4134-8054-abc3fb334872/is_silence_of_the_lambs_on_netflix_australia.pdfIn PDF document text
    • http://kepawomokatuke.myartsonline.com/how_to_install_petsafe_invisible_fence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8266cbd6-7d23-424b-bdc2-c6fccb2669a9/24752211540.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/17290082230.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_off00014022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14022 5080 bytes
SHA-256: f2184733dab53d8c48bd4f3bab0522857b90393e38d16463b82538cbfc77a58f
font_01_sfnt_off00015192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15192 11908 bytes
SHA-256: 0ff9bbc7245547052f20d1d67da4fbc98ba5b778dc536a0bec8b2fe0e4a59351

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