Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6804e10b3a9ee8…

MALICIOUS

PDF

69.1 KB Created: 2021-03-07 02:20:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: dd32b6d55e0eb9b4984f92ae8e543bb4 SHA-1: ed31883271d136ce54f31376d410fc931da596a1 SHA-256: 6d6804e10b3a9ee85e5426862e4e8e41c3515344eccd7effc3004e402ab29cbd
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by multiple heuristics as malicious, specifically for containing a large number of external links, many pointing to redirectors and disposable hosting. The ML classifier also strongly indicated maliciousness. This suggests the document's primary purpose is to act as a link farm, likely leading users to phishing sites or malware downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/wb?keyword=navajo%20creation%20summary In PDF document text
    • https://verebabivudasa.weebly.com/uploads/1/3/4/7/134771522/nobonakupasi_lotubodiz_kenorurag.pdfIn PDF document text
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/9226fa2496.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/fishing_rigs_for_bass_uk.pdfIn PDF document text
    • https://dodivivedi.weebly.com/uploads/1/3/3/9/133997878/xonegifiz.pdfIn PDF document text
    • http://jujanaxuwiroki.iblogger.org/bipejapivedupusekejizame.pdfIn PDF document text
    • https://buxexemap.weebly.com/uploads/1/3/4/8/134890763/wexeb_kafefadewopited_tugikozelobivig_gokupuwuzoxaxuw.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/42486041635.pdfIn PDF document text
    • https://wuwotozon.weebly.com/uploads/1/3/4/3/134315251/e7ebb8da55.pdfIn PDF document text
    • https://wokonupojelofa.weebly.com/uploads/1/3/5/3/135351156/dujomemedu-wabujena-femadimakuge-taruramofabemi.pdfIn PDF document text
    • http://walolexokesufa.sportsontheweb.net/63975777901.pdfIn PDF document text
    • https://dawutika.weebly.com/uploads/1/3/1/4/131407504/vojumemuwi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/aadhar_card_mobile_no_link_form.pdfIn PDF document text
    • http://titugol.atwebpages.com/koxakepuraxuvazunax.pdfIn PDF document text
    • http://pasifowon.atwebpages.com/59151466428.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/exploits_of_a_young_don_juan_movie_cast.pdfIn PDF document text
    • http://zunebodiz.epizy.com/48256750072.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/how_to_plot_a_gradient_vector_field_in_mathematica.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/barracks_noun_form.pdfIn PDF document text
    • http://kojajopi.epizy.com/rusevuzunoxedutodefig.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/regakikimozema.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_off0000d1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AF 5120 bytes
SHA-256: 4f8a9ffad2388468a475d9124c4716de6a646d23eea60577cdd33a01e94cfbb7
font_01_sfnt_off0000e31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31C 10676 bytes
SHA-256: 1a7e704d460dbf17ccc4ec4ff352e8c0c24d58cf77ef15aae92d93e092e7f519

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