Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a3f5bc8b1dece11…

MALICIOUS

PDF

106.9 KB Created: 2021-05-22 15:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 3fcdc4808d2138727e3573a1bca2eae6 SHA-1: 531637044a500b582a52fc30e72c0fd2037b4960 SHA-256: 8a3f5bc8b1dece111f9192cd58be48c49c9e9e1d5932cca6825e2a3dc5d3261a
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to redirect users. The presence of a URL with a 'utm_term' parameter suggests a phishing or scam attempt to lure users into downloading potentially malicious content. ClamAV and ML classifiers also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://seumenha.ru/strik?utm_term=the+magnetic+mastermind+kit+free+download PDF link annotation
    • https://lapadodipelij.weebly.com/uploads/1/3/1/1/131164402/sebisel-jejujeji-ragude.pdfIn PDF document text
    • https://wejanorop.weebly.com/uploads/1/3/2/3/132303338/kuzatove_wumudoxu_bezuzopat_lubowudezepifes.pdfIn PDF document text
    • https://wazajodowefode.weebly.com/uploads/1/3/4/0/134017502/fokeboleleloxisomat.pdfIn PDF document text
    • https://nilorajokurede.weebly.com/uploads/1/3/4/6/134626806/4389665.pdfIn PDF document text
    • https://remejatezikame.weebly.com/uploads/1/3/1/0/131070309/5641352.pdfIn PDF document text
    • https://denonifo.weebly.com/uploads/1/3/4/7/134709080/e685bdf.pdfIn PDF document text
    • https://riwewupurudo.weebly.com/uploads/1/3/1/3/131381540/kixovukogifixu.pdfIn PDF document text
    • https://vugigedekamem.weebly.com/uploads/1/3/4/3/134339685/fd87b.pdfIn PDF document text
    • https://seligelota.weebly.com/uploads/1/3/1/4/131453084/17da13e8572aecd.pdfIn PDF document text
    • https://lusenivusimutom.weebly.com/uploads/1/3/4/8/134887898/7329907.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/lupuvogotog/sijeziwimukata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e5bbbf6-6c32-4cc1-a1b9-b706b7c12ae3/begizifuvixuwifugukak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa6e9ec2-9a30-41a9-8da6-2475a7ded07f/39147253497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0606756f-a7ab-4173-a3ec-70c4c2610805/song_of_solomon_3_4_king_james_version.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/88783347445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7a19dea-5908-419f-8bab-e5e5cb704cec/how_much_is_27_months.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/15833346551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/207e5371-ec39-44ac-8b80-322352bad722/how_to_draw_a_dragon_step_by_step_easy_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a9eb638-ede3-450c-b642-dcff7ec3917c/grade_10_english_pupils_book_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c8e940b-d343-48be-8dc4-46f5b2fd77c0/sennheiser_xs_wireless_true_diversity_receiver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68ff471a-5c73-4533-9374-c1c5e95a417d/dish_network_login.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57cae370-12ab-4f3e-89e3-d964cc1c8f77/sat_test_dates_2020_locations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab72ce8a-9072-4f95-a363-ed0e181a940b/porter_cable_framing_nailer_fr350_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59018124-bfa2-40af-91f5-7d2bb081249d/tekelotoniwono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb098ac-255e-41ef-aa3e-89de6d505931/wuvaxofabuxetoxijujojib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b81a9cdf-a4a0-4172-b276-6e1daffed19b/8645702939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/246e99b2-b751-4673-97e4-404a2c837a33/gavikunufinujofoja.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_off00016267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16267 5540 bytes
SHA-256: 989695e7cf8be7f59b7f7da7989d332ced1988ec6af8c7897de6d80b894e446d
font_01_sfnt_off00017524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17524 11920 bytes
SHA-256: 6fa6e2ccadbfa8758d76efc1bf4552dc18dc83a5bc334129a1a7735bb4c42e0f

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