Malicious PDF — malware analysis report

Static analysis result for SHA-256 118d1dfdf4ccd71f…

MALICIOUS

PDF

76.1 KB Created: 2021-03-07 23:52:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b14af4c35003840e5b0c9ad352b5f8ba SHA-1: 58c489ecfc22bd41804562968236aa37db85b9cf SHA-256: 118d1dfdf4ccd71f99966bc37a14c0427c6f47f719284961b1021b6fbc6de3d1
156 Risk Score

Malware Insights

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

The file is a PDF that contains numerous external links, flagged as a 'PDF_SEO_LINK_FARM'. The document body, though heavily obfuscated, contains text related to 'profit center table in sap bi' and is generated by wkhtmltopdf, suggesting a potential SEO spam or phishing lure. ClamAV detection and ML classification confirm its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wix?keyword=profit+center+table+in+sap+bi
    • https://cdn.sqhk.co/lesasafo/gTD5Cgi/reigns_game_of_thrones_achievement_guide.pdf
    • http://lynciguest.com/letter_tracing_worksheets_for_3_year_oldstbsbm.pdf
    • http://foxiduwanati.mygamesonline.org/vobitusabaxizaxizeseno.pdf
    • https://cdn.sqhk.co/roretuduva/hheib0H/78353870969.pdf
    • http://puvepum.getenjoyment.net/vifoxutiv.pdf
    • http://todayshop.website/golf_club_yardage_cheat_sheet1bttl.pdf
    • http://parralax.net/pagusanucjaqp.pdf
    • https://cdn.sqhk.co/pulununese/bgehigi/49049642743.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/339e310e-1db0-4b5f-9293-306a395d9dcb/48834026911.pdf
    • http://kupupejewix.epizy.com/59045234390.pdf
    • https://uploads.strikinglycdn.com/files/0d1552c1-3c2c-448d-8e2d-286d902c2b58/sifakoxejav.pdf
    • https://uploads.strikinglycdn.com/files/6a0512c0-2eaa-4ebd-932f-ccc8dafde20f/what_is_the_default_ip_address_for_netgear_switch.pdf
    • https://uploads.strikinglycdn.com/files/682a610f-62b5-4eb7-be8c-598960006559/how_to_change_the_toner_on_a_brother_mfc.pdf
    • http://faripemisale.rf.gd/matriz_de_swot.pdf
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_110ccd2f00204a6eadb8fcb17807d210.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4cad3761-41dd-41a8-9cde-4094f729b5c9/28549531185.pdf
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_b9a45ffb799c46e68d40fb55800fcf92.pdf?index=true
    • http://tajiroxajesolut.atwebpages.com/club_car_precedent_windshield_dimensions.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef55.bin
3fea56dc2ba8b93332a69e8a4e16a42a42c72aee8630aaee9d44319277273bbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF55 5152 bytes
font_01_sfnt_off000100e5.bin
bfe74ee1f4acf5bc3f7d0113130ec652bf96b8cd01031ed3b7752680a3664a5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100E5 10080 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.