Malicious PDF — malware analysis report

Static analysis result for SHA-256 973484b9620cfabd…

MALICIOUS

PDF

82.0 KB Created: 2021-04-29 09:36:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 130ce2093c2b5d6bbcdab666d31442fb SHA-1: 4e1cba540964ed5df52123590742c9ad74c30f7a SHA-256: 973484b9620cfabd890473584a3a99213b042a1eb84aee787c274f4659604374
126 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/strik?utm_term=rainbow+vacuum+malaysia+price+2019 PDF link annotation
    • http://checkmycredit.info/bolelojulofi9s3zl.pdfIn PDF document text
    • https://sunotutosa.weebly.com/uploads/1/3/4/4/134402565/6673687.pdfIn PDF document text
    • http://lamovingcompany.com/wikadakagooss7.pdfIn PDF document text
    • http://tonukavugu.mygamesonline.org/mabobamunon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448536/normal_5fc8a48fa578a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465938/normal_5ffe1eba93dc9.pdfIn PDF document text
    • http://nakijeku.mygamesonline.org/21252062091.pdfIn PDF document text
    • https://gevivakeje.weebly.com/uploads/1/3/0/7/130775257/90a71a.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/sivosirorir.pdfIn PDF document text
    • http://sellforce.ru/histoire_christianisme_en_afriquefwaud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486042/normal_5fca5fef498a4.pdfIn PDF document text
    • http://tiluvopira.medianewsonline.com/nier_automata_piano_collections_sheet_music.pdfIn PDF document text
    • https://wizisenax.weebly.com/uploads/1/3/4/3/134320615/jasufaxarob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410433/normal_5ffea27ebd7ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468550/normal_6010ee637179f.pdfIn PDF document text
    • https://dikijezirepa.weebly.com/uploads/1/3/2/8/132815872/0173b7.pdfIn PDF document text
    • http://kurutog.mygamesonline.org/fifa_world_cup_score_sheet.pdfIn PDF document text
    • https://wefogazasu.weebly.com/uploads/1/3/4/8/134880183/59379d.pdfIn PDF document text
    • http://idealicacolumbia.site/final_fantasy_7_original_review_ign0c70y.pdfIn PDF document text
    • http://trokot-tonirovka.online/word_search_inspirationhchoy.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/c335f53b-1d7d-4ffb-9faa-886aa563d51f/74770927715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e0486c-bb61-46d0-9254-f0f5a2b01fde/champion_generator_46595_parts_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9f03662-bafd-4821-8601-ff75a5b77768/koxiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/725cb7b2-d98c-49d5-a60d-ed96d91f0809/what_is_the_best_teas_book_to_study.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_off0000fcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC1 5960 bytes
SHA-256: e40e6db77a7493e4cfaace178cb1288aa08ff46d87d0dd81634b3f8758cc8f18
font_01_sfnt_off00011111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11111 12088 bytes
SHA-256: 4fc48b6da220fdc667712c1e4676548e829d99ef010f6d965ab40e2c1214865e