Malicious PDF — malware analysis report

Static analysis result for SHA-256 259c38c315dd79b4…

MALICIOUS

PDF

76.2 KB Created: 2021-02-14 13:21:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: d5576dfad54490317a1d689021273f28 SHA-1: d8047e51b83e59a1a643264589496431da9e62ea SHA-256: 259c38c315dd79b45f1ff4ad762e40dd851bdf3c2ff43026531681efb4c13f6f
134 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious workflow, likely involving the redirection of users to malicious sites or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/aws?utm_term=alagappan+4th+edition+pdf+free PDF link annotation
    • https://cdn.sqhk.co/mumesimasozo/eidgcgf/dragon_wars_trailer_ita.pdfIn PDF document text
    • http://summer-italy.fun/super_archery_shooting_target_shoot_rescue_cuttere8upt.pdfIn PDF document text
    • http://testvvd.xyz/kiroputifejukibokix1or1l.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/OFjinjh/meteor_impact_nigeria_2020.pdfIn PDF document text
    • http://kittyplay.online/3rd_grade_spelling_bee_wordsr47q5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404112/normal_601219225444a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387567/normal_600800c62cf44.pdfIn PDF document text
    • https://cdn.sqhk.co/muxigatatini/gjjom5P/pobrecito_bebe_translation.pdfIn PDF document text
    • http://majijeniwadimu.22web.org/instagram_album_er_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404520/normal_5ffdb0cb9c5c9.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/sulasatevirexo/xubasagimevakiburumosite.pdfIn PDF document text
    • http://pogebikaku.epizy.com/modujur.pdfIn PDF document text
    • http://sirilamezowi.epizy.com/15159808000.pdfIn PDF document text
    • http://boxulinizisa.epizy.com/gasaninunimobogowerud.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/bipixojuxexivifaw.pdfIn PDF document text
    • http://tereraje.rf.gd/formal_cocktail_length_dress_definition.pdfIn PDF document text
    • http://witoluteg.epizy.com/doxewonerokafinakasuga.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD717 5200 bytes
SHA-256: ce7e1217ef8bf428ea4c5efc1bb466fc3cba05091165469e99212467b5e1402f
font_01_sfnt_off0000e8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D0 10580 bytes
SHA-256: d29b37758294900d1c24c2ccb3da8384412194f432e5724bc0171f64388500a7
font_02_sfnt_off00010d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D35 16284 bytes
SHA-256: 5e32bc84d974f75725ef4c43d63d66393f8aa05680cf26248f8a0567f4f4477e

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