Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d7cf02c5932678…

MALICIOUS

PDF

103.3 KB Created: 2021-05-09 04:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 31fe2d6895532444d9444f1bbcf496c7 SHA-1: a9cdab4ed40505ff8490b4e97ff3bbc6c900276d SHA-256: 97d7cf02c59326782ca3cc70303079c1567e42038fcecb9d4163205b43aea36b
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a likely attempt to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of many external URIs suggest the document's primary purpose is to act as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 4

  • 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://jumiwimov.ru/strik?utm_term=is+tp+link+trustworthy PDF link annotation
    • https://cdn.sqhk.co/tutadazi/hijfcif/download_forward_assault_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/jeogiJ3/arc_browser_android.pdfIn PDF document text
    • https://cdn.sqhk.co/kososojog/geHjchg/tinuvejimewe.pdfIn PDF document text
    • http://wordsidepost.top/pufozojikaptbx2j.pdfIn PDF document text
    • http://goldstein.berlin/95803745662uocip.pdfIn PDF document text
    • https://cdn.sqhk.co/zisenusaf/jg5pI49/26819454635.pdfIn PDF document text
    • https://cdn.sqhk.co/vivutazawi/VsVJ41Y/nuvasiwojezosugejidijaka.pdfIn PDF document text
    • http://rejojonomupe.iblogger.org/lepix.pdfIn PDF document text
    • https://cdn.sqhk.co/lekifuwixal/jbEgjnI/6478405878.pdfIn PDF document text
    • https://cdn.sqhk.co/fagisuxupinu/fnRFCq6/chargepoint_stock_ticker_symbol.pdfIn PDF document text
    • http://portkamesto.site/15452950257z3w0s.pdfIn PDF document text
    • http://kuxakutefop.22web.org/antivirus_gratis_para_celular_apk.pdfIn PDF document text
    • http://instapriz.online/lozerogariralefeweluruludvrjd.pdfIn PDF document text
    • https://cdn.sqhk.co/tixelila/ifhh15x/guideline_hyperuricemia_and_gout.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jemavavobeziv.epizy.com/66931938997.pdfIn PDF document text
    • http://kiwimusef.epizy.com/34898054160.pdfIn PDF document text
    • http://lilipokujiluzi.epizy.com/google_docs_to_jpg.pdfIn PDF document text
    • http://jolavewavesuj.epizy.com/42997226981.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/473ac01f-3c15-4778-a4c2-28be557ed7cd/vupitimisizejorakitaxukaj.pdfIn PDF document text
    • http://radagosedapisat.epizy.com/sat_subject_test_math_2_formula_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7001edc4-2455-4f58-aa0d-9d182cd529a3/74357358843.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/417e2677-6c87-41e9-a4a6-bbea72bf27fb/fusodutosuzolatad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e63e130-1a32-4291-97d2-68558340cc12/how_to_write_a_personal_development_action_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d36393f8-2556-4760-adf1-2d9f784184c8/90361118133.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CDC 6864 bytes
SHA-256: 87676e9b6acbfe2de35b568054c29f1f8f75fbe1725518f75971eab8cadb2425
font_01_sfnt_off0001542e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1542E 4892 bytes
SHA-256: c5b57a3ff705088552eacd144b691e506464397ddbce3d076955b04df2641f38
font_02_sfnt_off000164e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164E2 13100 bytes
SHA-256: feb151c688f11c7750bceec64bb5d7e26a893b5da47981a1a2cf2f818cefb078

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