Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d712fcd3b2f0ce…

MALICIOUS

PDF

82.1 KB Created: 2021-05-06 03:19:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d292db160dffa027d559c2c3428e9ac3 SHA-1: 0109822f5f8d951ecfaab7cfd8f73a6b756ce29e SHA-256: e3d712fcd3b2f0cee33d395527d664f43df62110d3d0966575d2e2b8df5abd19
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical PDF_SEO_LINK_FARM rule indicating a mass of external links. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest a phishing or link-farming scheme, potentially distributing further malware or leading users to scam pages. No scripts were extracted, but the PDF structure itself is used to host and present these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/strik?utm_term=is+nikon+d3400+a+good+camera+for+beginners
    • https://suxokigivulumu.weebly.com/uploads/1/3/4/4/134479742/5885897.pdf
    • https://mogoribomos.weebly.com/uploads/1/3/4/2/134266362/426ed49.pdf
    • https://waxajevigeko.weebly.com/uploads/1/3/1/4/131453715/tababobebevuvodija.pdf
    • https://zesajuletolif.weebly.com/uploads/1/3/0/9/130969916/3374105.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://s3.amazonaws.com/bogeguva/87351337433.pdf
    • https://s3.amazonaws.com/jeponowon/1994_honda_accord_catalytic_converter.pdf
    • https://s3.amazonaws.com/vonusirukete/2012_jeep_grand_cherokee_fog_light_bulb_number.pdf
    • https://uploads.strikinglycdn.com/files/8b507ddd-44a0-4690-a16f-5844aadf7058/60425613513.pdf
    • http://kidojudal.epizy.com/is_journalist_and_reporter_the_same.pdf
    • http://joriboka.epizy.com/buffer_system_in_human_body.pdf
    • https://uploads.strikinglycdn.com/files/925e0ad1-a987-4079-9fc8-1a068e7b3d39/how_do_you_fix_the_incline_on_a_proform_treadmill.pdf
    • https://s3.amazonaws.com/rokuwapesu/dialysis_guidelines_philippines.pdf
    • https://uploads.strikinglycdn.com/files/8719db88-31f5-42a2-b78b-1a7bc0226d5f/integrate_cos_x_sin2x.pdf
    • https://s3.amazonaws.com/vuxagixil/69459148431.pdf
    • https://s3.amazonaws.com/fuwawibu/karuppusamy_kuthagaitharar_full_hd_movie_free.pdf
    • https://s3.amazonaws.com/fejakixoweka/tropic_of_cancer_book.pdf
    • https://uploads.strikinglycdn.com/files/91a3eac5-abee-432d-b32f-6444a2f0eae1/wd_my_cloud_usb_supported_file_system.pdf
    • http://desibevazivoxan.rf.gd/java_decompiler_for_ubuntu.pdf
    • http://duwopatovulid.rf.gd/alagappan_google_drive.pdf
    • https://s3.amazonaws.com/jutenojamega/82111035347.pdf
    • http://kunesapog.epizy.com/14987378683.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2b2.bin
0d664b6bc31089e0ff318534af33ce24c2b0275c4390dd84f31ad6333dfd6751		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B2 5844 bytes
font_01_sfnt_off00010685.bin
0b38f6fd5e0b54bfa22d5adee1cfe00629fe134100fc7cfc1ad14a2ab7974207		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10685 6148 bytes
font_02_sfnt_off00011665.bin
489ba3de583fbf3223df5386c1d991e3bfb989d5c7efc3892379f79d917740ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11665 10608 bytes

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