Malicious PDF — malware analysis report

Static analysis result for SHA-256 47abc22eb8438fed…

MALICIOUS

PDF

71.9 KB Created: 2021-04-04 13:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c5d2685e4ded4a218846d51a015c5f46 SHA-1: c47f31278ff8002ecc8b75690a858e30d98fedb8 SHA-256: 47abc22eb8438fedbc83e7e96f97267aff4bc2b465f092f0d1b7e8b5184f8726
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical finding for a PDF redirector link to a known malicious domain. The PDF also contains numerous links to disposable hosting, suggesting a link farm used for obfuscation or distributing malicious content. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly indicate an attempt to lure the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/123?utm_term=ajali+ya+morogoro+video In PDF document text
    • https://luzidasagozoro.weebly.com/uploads/1/3/4/3/134319964/826bab185c997.pdfIn PDF document text
    • https://wotopegajoxife.weebly.com/uploads/1/3/4/0/134042499/34f4cdf5baf.pdfIn PDF document text
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/5fbc0a.pdfIn PDF document text
    • http://bukupiduge.mypressonline.com/dogberry_much_ado_about_nothing_character_analysis.pdfIn PDF document text
    • http://vexasefagi.scienceontheweb.net/is_the_secret_life_of_bees_movie_on_netflix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391649/normal_601ccedb7a895.pdfIn PDF document text
    • http://pipetopewuja.iblogger.org/13548336499.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447098/normal_5fc8632e86bd9.pdfIn PDF document text
    • https://sinonulu.weebly.com/uploads/1/3/4/6/134654736/gidawonesavaw_kegilepi.pdfIn PDF document text
    • http://juzajikadig.22web.org/bpsc_ae_pt_syllabus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mavixu/how_many_dish_subscribers_are_there.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a7790b-a0c3-4fdf-876a-6a76aaa4fdc9/33135389265.pdfIn PDF document text
    • http://lenepozomewu.epizy.com/dadazovodulebokov.pdfIn PDF document text
    • http://suwojubomitela.epizy.com/72889141466.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/offensively_assertive_informally_crossword_clue.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/chrome_settings_passwords_and_forms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed866235-9513-412f-95df-4168adc536cc/18724993061.pdfIn PDF document text
    • http://busugotuwege.epizy.com/watercolor_brush_procreate.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_off0000d21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21D 4796 bytes
SHA-256: d06ebc7e5e75783c36de7c8615a49ec0b3810bb78237a4001f987d582cf56ae0
font_01_sfnt_off0000e271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE271 9908 bytes
SHA-256: 3f041a6c2e1059a1806453e6ae4eee49fcab048a7acbe5bf2d117d697971e63a
font_02_sfnt_off00010466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10466 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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