Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad3b2dc9b34ab5c…

MALICIOUS

PDF

73.2 KB Created: 2021-03-09 23:27:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 74a17718dbac9a85b6d563be8c9431c8 SHA-1: 56533430483b16e72a25962120ab71ea2b34138d SHA-256: 5ad3b2dc9b34ab5c01bd271d49b95be0bc290a3c4e30c0351bfa2c198d472224
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 0.9995

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://bologen.ru/123?utm_term=branches+of+earth+science+worksheet+answers PDF link annotation
    • http://sogejovep.mypressonline.com/can_you_really_learn_spanish_with_rosetta_stone.pdfIn PDF document text
    • http://zobabikox.medianewsonline.com/substance_abuse_counseling_theory_and_practice.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/xaxuvusez.pdfIn PDF document text
    • http://pifowovumuwe.medianewsonline.com/34445257691.pdfIn PDF document text
    • http://bexowobiminefi.mywebcommunity.org/diary_of_a_wimpy_kid_book_11_read_online_free.pdfIn PDF document text
    • http://povulofi.mywebcommunity.org/98092839147.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/88482446741.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/cb7b0bfa-f7d6-40f0-9741-4156af33986e/sozujudixejitatenipij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76c8687e-0630-42f4-babc-e36e3a343ffe/python_basic_interview_questions_geeksforgeeks.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/athene_life_insurance_surrender_form.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/fefimifored.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34ad4896-b4b3-416f-99d2-37e9fd8e574e/ritijewimebebufajibigapaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ed92d1d-cf8d-4359-99d8-36f37a77a632/raraj.pdfIn PDF document text
    • http://megigezorozo.atwebpages.com/imax_b6_battery_charger_review.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/dunujaba.pdfIn PDF document text
    • https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_9ca1fc5fab7a4ea2a6624ce90f8a0414.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefabe/3d_max_sofa_blocks_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/gitonidutezunaxa.pdfIn PDF document text
    • http://womawujun.atwebpages.com/difference_between_hero_4_silver_and_black.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/kupepimen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3911b4f3-8383-4a9b-8edb-65d1c3e0d456/best_mcat_practice_test_reddit.pdfIn PDF document text
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_3aa5295c757949aca3d39a05a90fa6cb.pdf?index=trueIn 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_off0000e229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE229 5144 bytes
SHA-256: e81e259531bb253103a78256eb6fd2dd050daedda3ab7b6aed8573db087d8539
font_01_sfnt_off0000f3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B6 10320 bytes
SHA-256: 46e5ea2356ee89eb1b89e72669b525bf1421f69ff1b3a6a7449b5be409e5e5cc

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