Malicious PDF — malware analysis report

Static analysis result for SHA-256 a44301801ceab53c…

MALICIOUS

PDF

78.6 KB Created: 2021-03-03 23:06:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5ed72ed0116a498c17f1bf57892d0499 SHA-1: a943a833799428fd31ca949d0ee42a432c040ca3 SHA-256: a44301801ceab53c021066accf74e5139000cbf46370f29b88bc1f100352bb74
66 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by ML classifiers as malicious. The document body text suggests a social engineering lure related to technical support for a WiFi extender, likely intended to trick the user into clicking the malicious links. The presence of numerous external URIs and a link farm heuristic further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/123?utm_term=how+do+i+reset+my+linksys+wifi+extender+re6700 PDF link annotation
    • https://cdn.sqhk.co/puvegipuros/c1uhfhj/kexovaz.pdfIn PDF document text
    • http://pimebujeben.66ghz.com/palliative_care_coding_guidelines_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/vudararemane/hVlK4wT/man_down_where_you_from.pdfIn PDF document text
    • https://cdn.sqhk.co/vomemubevu/iacjiSW/99399378864.pdfIn PDF document text
    • http://bamivuvuzete.iblogger.org/mainstays_tension_pole_shower_caddy_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/ieMhdUf/19518321641.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/nJvVWjd/amazon_fire_tv_cube_specs.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/iijjhdH/furususomavobepanidujawo.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/iniaDf9/voburogubabefazunon.pdfIn PDF document text
    • http://podarokinsta.site/best_gmat_prep_book_2020wu4lz.pdfIn PDF document text
    • http://nomudepalak.medianewsonline.com/how_much_does_a_heater_blower_motor_cost_to_replace.pdfIn PDF document text
    • http://slmit.space/98952750897rboy5.pdfIn PDF document text
    • http://lovasosirukes.iblogger.org/analog_clock_free_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/RgcTSha/american_football_manager_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/tesigasefaxe/eifO773/nutri_ninja_veggie_smoothie_recipes.pdfIn PDF document text
    • http://presentinsta.online/bavemopimebuwipb6zev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vokuloramemi.epizy.com/pa_agreement_of_sale_real_estate_form.pdfIn PDF document text
    • http://wotexel.rf.gd/zuzedigoxabumokiz.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C0 5504 bytes
SHA-256: e5bd91771b60fe9853d4e945913fee878db38c2185b3c6d47dd1302c1ac4fd6e
font_01_sfnt_off0001048b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048B 12068 bytes
SHA-256: a7498beef149b59dce5e05f0a09b1ec215d5ee91944a5050b189446db5d8b583

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