Malicious PDF — malware analysis report

Static analysis result for SHA-256 49095bde6f49f74d…

MALICIOUS

PDF

129.6 KB Created: 2021-04-03 14:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 84d0aa2c8a0af275e32af7248c345e46 SHA-1: 0a8952989704246e68163dec8a5ce3c62771c740 SHA-256: 49095bde6f49f74d0853498703167bea3071a3fd7ecc8351553c7a50e3efc4c2
186 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting a phishing or spamming operation. The document body, though heavily obfuscated, contains text related to 'Asian games 2020 results pdf' and metadata indicating it was generated by wkhtmltopdf, likely to appear as a legitimate search result. The presence of a PDF_SEO_LINK_FARM heuristic firing and ClamAV detection as Pdf.Phishing.Trojan strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://jacksth.ru/award?keyword=asian+games+2020+results+pdf PDF link annotation
    • https://cdn.sqhk.co/rikopekela/BWKgcjb/virtual_piano_lessons_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/jthhgje/20887635798.pdfIn PDF document text
    • https://cdn.sqhk.co/gupukutolet/9jcgcwU/veregelefewinujikemep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ad4b980f-ce25-49fc-a7db-f3a510c752d4/18745349957.pdfIn PDF document text
    • http://ronapidilejok.rf.gd/how_to_measure_a_valley_pool_table.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/filen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9be51561-37d2-45f2-a3c5-b178923dc89e/how_to_get_free_last_wish_raid_chest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2824dcc3-db20-4aa2-9104-d3d206a603cc/top_stock_market_books_2020.pdfIn PDF document text
    • http://dedamedasobime.epizy.com/50169217335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f5cf78a-85ed-4238-b0bb-57415b7c28b8/preposition_exercise_for_class_7_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/nuxokisivadiwu.pdfIn PDF document text
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_b9bde1d5a1274b51b9a0deb149c483fd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kefodek/maus_chapter_4_summary_sparknotes.pdfIn PDF document text
    • http://pizusikobejitix.epizy.com/87519694891.pdfIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_724c6b940edb40e4a745a00b6d4c1c78.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fapaga/fiche_mtier_brancardier.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/creature_3d_movie_song_320kbps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11205319-dbe6-4ab5-ab7b-865c85c067f4/planet_fitness_cancellation_form_printable.pdfIn PDF document text
    • https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_ee8cae4bf7b2427b9eee1102370372c1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/botatosoruzefekupobor.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/kigenat.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
    • http://www.gnu.org/licenses/lgpl.htmlRegularDanhHongIn PDF document text
    • http://www.geocities.com/dnhhngIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000194dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x194DD 5396 bytes
SHA-256: 20222a3bbe115563696cfa3df991b7467aaf743aa236a6cb9e95d82d2bc87f8c
font_01_sfnt_off0001a712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A712 10048 bytes
SHA-256: 591fbe219e38aa3ee514fe3f949992ec347a59d116d8e70699fc9a645631b594
font_02_sfnt_off0001c23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C23A 12184 bytes
SHA-256: cb833c676630622246c7a6c310dd9c6d71268617e3dfbc7c6eec3f7b383d53e6
font_03_sfnt_off0001ea95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA95 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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