Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2b77cc373a5e1d…

MALICIOUS

PDF

75.3 KB Created: 2021-03-19 21:04:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 18d9613f36f43d94922570fb32a562ab SHA-1: e843efe0ad0d032bbfff93e82493a510927d8ad4 SHA-256: 7f2b77cc373a5e1de9a0ee9b4e6a31605475484ad75a49999fbe05fc47c6cd23
66 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to manipulate search results or redirect users to malicious content. While no scripts were explicitly extracted, the nature of the embedded links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://xezojetit.ru/strik?utm_term=how+to+check+transmission+fluid+in+2005+honda+odyssey PDF link annotation
    • https://cdn.sqhk.co/kuniremolu/iYggtJL/970156668.pdfIn PDF document text
    • http://zasijeg.iblogger.org/adenosina_diaminasa.pdfIn PDF document text
    • https://cdn.sqhk.co/tititafoza/fgeiihc/tuvasebimowu.pdfIn PDF document text
    • https://suzujiwome.weebly.com/uploads/1/3/0/7/130776055/3717431.pdfIn PDF document text
    • https://rekazisiw.weebly.com/uploads/1/3/0/8/130874265/3259939.pdfIn PDF document text
    • http://runojiwum.getenjoyment.net/how_to_sell_a_small_business_in_ontario.pdfIn PDF document text
    • http://bukenisefino.mygamesonline.org/2002_buick_century_3.1_catalytic_converter.pdfIn PDF document text
    • https://cdn.sqhk.co/tupujokuz/cghhahb/birakuti.pdfIn PDF document text
    • http://ligugiban.scienceontheweb.net/how_to_calculate_newtons_second_law.pdfIn PDF document text
    • https://cdn.sqhk.co/wopidevepip/0QijIff/little_big_snake_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/aByjdnh/76714867384.pdfIn PDF document text
    • https://vataripisak.weebly.com/uploads/1/3/4/6/134600115/104d6080881c51.pdfIn PDF document text
    • https://wiwovadale.weebly.com/uploads/1/3/5/3/135322143/kakokur-fewukezeju-pesanukutelewut-ziwajopogawetan.pdfIn PDF document text
    • http://jomekiziwe.22web.org/86635957805.pdfIn PDF document text
    • https://lebudikex.weebly.com/uploads/1/3/5/3/135310552/742393.pdfIn PDF document text
    • http://rejasepilibuxep.iblogger.org/summer_season_worksheets_grade_1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zobuxosem.rf.gd/star_answers_to_interview_questions_examples.pdfIn PDF document text
    • http://gowofar.rf.gd/wulilagafemufetemejub.pdfIn PDF document text
    • http://xibiwoziveva.epizy.com/sapivojujulawonezivotele.pdfIn PDF document text
    • http://kedokonox.rf.gd/runigirazopusefanovofin.pdfIn PDF document text
    • http://tujefuguxofela.rf.gd/nubokunanumo.pdfIn PDF document text
    • http://ziluzufufub.epizy.com/xenafikimeledoleg.pdfIn PDF document text
    • http://pufaxutunipoja.epizy.com/beechcraft_bonanza_a36_flight_manual.pdfIn PDF document text
    • http://zozadugaweguj.epizy.com/suncast_hose_reel_replacement_crank.pdfIn PDF document text
    • http://zezunas.epizy.com/56794451586.pdfIn PDF document text
    • http://kojenixerog.myartsonline.com/mapapixafite.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_off0000e7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FD 5876 bytes
SHA-256: 7c7c3f97ef6f24eecc95cffe669c017498048102b4f9dda7bb6e6697a5b33806
font_01_sfnt_off0000fbed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBED 10392 bytes
SHA-256: 8f1d1f8f560445cc101e99f140f62e00165459b262f2abfe19cc2de83cc90e23

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