Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d07501cd2e822bd…

MALICIOUS

PDF

77.9 KB Created: 2021-03-07 07:50:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8d272a167aa7758e0ca38469c766715a SHA-1: 6f506854d835094193f0b2d2caea91031aa5b9a4 SHA-256: 8d07501cd2e822bd758eb35afc5ab1c0993fe16305601a308333a5780e4516cf
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though heavily corrupted, contains text related to 'social security medicare cost for 2020', likely a lure. The presence of embedded URLs and the ML classifier's high confidence score further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://yafferge.ru/strik?utm_term=social+security+medicare+cost+for+2020 In PDF document text
    • http://afracheat7.xyz/69426315063a4ovo.pdfIn PDF document text
    • http://dkblogin-de.com/fifty_shades_freed_movie_in_hindi_filmyzillag56du.pdfIn PDF document text
    • http://slimitalia.space/wixela_inhaler_how_to_usew62xe.pdfIn PDF document text
    • http://natikolom.site/munefazebunenabdepg.pdfIn PDF document text
    • http://zavarivaemvmeste.ru/washington_wizards_scores_and_schedulec1yij.pdfIn PDF document text
    • http://guitar.su/967710967331q2xp.pdfIn PDF document text
    • http://videohost.space/58170321077m35yo.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/cast_screen_to_samsung_tv_androidhjbol.pdfIn PDF document text
    • http://choosenews.space/axton_guide_bl2404d8.pdfIn PDF document text
    • http://goproonly.com/cuando_se_pone_la_corona_de_adviento6csze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3038a6f-1065-4432-a604-3d54125f3f57/greenlee_dm-20_troubleshooting.pdfIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_5ac3004c98c14cba996c9ccd01f47065.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/4511_7-_segment_decoder_datasheet.pdfIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_dff2f4d039604b6699334ffea3b76d15.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/daxemo/23675442949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcd96521-82fd-4c8d-bcb9-ed031282c794/english_grammar_worksheets_for_grade_6_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/50789825888.pdfIn PDF document text
    • https://e1bd05e7-a2ed-43df-b5fc-9bc8ee0b1a84.filesusr.com/ugd/08acf3_0c8e7d279928413ebf8ff21858b32963.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/2831603136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/092d0fec-8ded-4df7-be03-b97af4b1eb3e/jewununigebideragolupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c03000d-6b36-4e31-a1ab-d156ece12582/swann_security_camera_installation_guide.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 7

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_off0000f018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF018 5644 bytes
SHA-256: 21e54234dfa4b7d64de244db49f8df24f104451875ab8ad19d34cf7e8d946de3
font_01_sfnt_off00010344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10344 11392 bytes
SHA-256: f97de9f79ac6e02453fae3e00bd48a3c8d75895d98f96f6d3f772e2616bdd229

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