Malicious PDF — malware analysis report

Static analysis result for SHA-256 9abdd852674b079a…

MALICIOUS

PDF

77.5 KB Created: 2021-05-08 03:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2b2da0a5d5326e2ef4bfda0dc8712f6e SHA-1: 511f79052206e1cf756a76bc34a85378a7e3ae94 SHA-256: 9abdd852674b079a39bc7adeadc305a9cdb8bed00c775444cd7ebf8ffbb058af
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one prominently featured in the document body, directing users to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://crophysi.ru/strik?utm_term=how+to+calculate+gross+domestic+product+per+capita PDF link annotation
    • http://kiwenalod.medianewsonline.com/pumivekogogim.pdfIn PDF document text
    • http://wimesuzajomos.mypressonline.com/gimuf.pdfIn PDF document text
    • http://memisada.mygamesonline.org/fofumudokeku.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/gfhgUih/71194893564.pdfIn PDF document text
    • http://linefofaxugedu.mywebcommunity.org/application_of_nanotechnology_in_cosmetics.pdfIn PDF document text
    • http://taxarigi.sportsontheweb.net/biography_book_download.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/82586152915.pdfIn PDF document text
    • http://wejaduz.mypressonline.com/wanaroxubosed.pdfIn PDF document text
    • http://wififej.mypressonline.com/duxukeb.pdfIn PDF document text
    • https://cdn.sqhk.co/fafovewidom/gggieKF/82089143853.pdfIn PDF document text
    • https://cdn.sqhk.co/turanexode/UUXhcSg/english_spanish_translator_offline_dictionary_for_pc.pdfIn PDF document text
    • http://lazotub.mywebcommunity.org/58276434128.pdfIn PDF document text
    • https://cdn.sqhk.co/jufenakajo/KBhaGij/ice_cream_shop_toys_r_us.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/jvyjicj/fingerhut_mobile_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xowilewegiwo.myartsonline.com/womidutenoxedowapodanivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3248e498-1b6b-4305-9e22-b3e4550ead4c/what_is_the_most_reliable_brand_of_top_load_washer_and_dryer.pdfIn PDF document text
    • http://wegorabeg.atwebpages.com/jonosanowisosopumubag.pdfIn PDF document text
    • http://lugenizuridaj.atwebpages.com/riwilikinawovoxavalosan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22611166-4cea-40cb-9583-d9da43c1b2ed/what_is_distributed_pervasive_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05ece329-b4d8-4cf4-b679-c2b3b2bfc44d/how_to_make_yourself_eat_healthy_during_pregnancy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cac60cc-5dd8-4072-88f1-1edc9d44d8a2/bexafixakak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59a8fed7-d471-4223-bb57-1368de635e76/importance_of_database_management_system.pdfIn PDF document text
    • http://tirisesu.onlinewebshop.net/konsensus_asma_pdpi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6ad2b8c-3a6c-4e45-aed8-c1644554ff98/how_do_you_reset_a_dometic_thermostat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37432211-133d-4481-9e46-93c5c164659a/pretty_little_liars_season_7_episode_16.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73557e04-e6f1-4ecf-90f6-474ccf2c74f5/a_handbook_of_literary_terms_amazon.pdfIn PDF document text
    • http://ropupifalapoges.atwebpages.com/90431428507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e0b11c1-1ec3-4166-84c7-e398ed9fb188/1597589407.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_off0000efee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEE 5448 bytes
SHA-256: 89a3bc5c9a89e59bc5e7e5d0fd00e624e492251e8d64ec1ca8c2355c958930e6
font_01_sfnt_off0001026b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026B 10704 bytes
SHA-256: 62a4f4548c28787b4abb9e92368299ed209f9095aebb93f3d1823cb832a1c421