Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f2d4f4383772a1…

MALICIOUS

PDF

78.8 KB Created: 2021-03-10 11:14:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 35a71d50a4d9a4d5d8c4278d464edcd7 SHA-1: ede90214ed433a7e16f77eb985d82c07615b977d SHA-256: 58f2d4f4383772a16112674ee616d1b87b82fb4113b4af90b502be47ed322762
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 0.9992

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
  • 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://nipisod.ru/123?utm_term=structured+finance+and+collateralized+debt+obligations+pdf PDF link annotation
    • https://joguxakiwemov.weebly.com/uploads/1/3/4/7/134707067/vozetisarulerowupepu.pdfIn PDF document text
    • https://lopufofogepuxal.weebly.com/uploads/1/3/4/6/134695200/4729858.pdfIn PDF document text
    • http://love-your-lips.online/6708378617kbd9l.pdfIn PDF document text
    • https://pudisemibupar.weebly.com/uploads/1/3/4/0/134096773/xixekataxatonep.pdfIn PDF document text
    • https://jekodijup.weebly.com/uploads/1/3/4/4/134490718/971121.pdfIn PDF document text
    • https://texerazijibegu.weebly.com/uploads/1/3/5/3/135302316/86b953982915b19.pdfIn PDF document text
    • http://card2card-perevod24.site/what_is_the_exact_location_of_china0hmj5.pdfIn PDF document text
    • https://cdn.sqhk.co/sosexazefip/hLP4hdX/guide_for_among_us_impostor_gameplay.pdfIn PDF document text
    • http://klyshsheff.xyz/66417317032thvms.pdfIn PDF document text
    • http://ig-copyrightviolation.com/lokimepumajinojo7y5ip.pdfIn PDF document text
    • http://ketotreno.buzz/in_plant_training_report_format4zazv.pdfIn PDF document text
    • http://lefewibek.iblogger.org/woodworking_plans_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/jerowerar/4ghjjaC/duvidiwubaterevenazuler.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/a39aadae-cc24-4ce4-bd82-ba3d836aa43b/how_to_quit_smoking_book_by_allen_carr.pdfIn PDF document text
    • http://kewetevidelumuz.epizy.com/98226527633.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/96447072848.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/94748922697.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1417e752-43f2-4c1b-ab65-7140344d475b/los_juegos_del_hambre_capitulo_2_resumen.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/charlie_malayalam_movie_utorrent_2015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf4614e6-e7cd-4ee4-9900-b3bc8ecb0e6d/rekib.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/partnership_account_format.pdfIn PDF document text
    • http://gidigeja.rf.gd/is_it_true_that_on_your_16th_birthday.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7f9c5bc-9a47-4774-a354-2328f5672516/26056180932.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_off0000f4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F5 5616 bytes
SHA-256: 1669afb9c7a172df3cf98d3a3c266297d4151c1f483948f2526282aa1a8e1ef3
font_01_sfnt_off00010824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10824 10908 bytes
SHA-256: b0ba70c365c69de70bfce8c5bbfa95ea2c3e96ac8ac82aea7a37f04b2089d28b

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