Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce7a037810ac1dd…

MALICIOUS

PDF

80.9 KB Created: 2021-04-04 01:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4eefbf7751f53aaa2bda01bc49f42279 SHA-1: 7276637b66c0af502a15a068ff9a7ccbbfdb03ca SHA-256: 2ce7a037810ac1ddca458d603cd69f3c2c1c9a5bbe7bde008215edbfaea85bab
156 Risk Score

Malware Insights

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

The PDF file, disguised as a German learning resource, contains a significant number of external links, indicating a potential link farm or phishing operation. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/123?utm_term=books+to+learn+german+free
    • https://cdn.sqhk.co/vuvapolaxaj/ihhijed/vakeluwom.pdf
    • http://alphabitx.com/matudibowematodaxurewe594ck.pdf
    • https://koreperuk.weebly.com/uploads/1/3/2/6/132680900/34376.pdf
    • https://cdn.sqhk.co/mitukutowum/E6hetaG/air_control_lite_app.pdf
    • https://cdn.sqhk.co/ritafase/U3DI7hg/steam_download_mac_among_us.pdf
    • https://goluluvofa.weebly.com/uploads/1/3/2/7/132712214/buzaxo_toweve.pdf
    • https://cdn.sqhk.co/nokotadi/iVjichh/77119275725.pdf
    • http://sallehq.xyz/2214657317q5fmj.pdf
    • http://subonus.ru/vavubidonknxp4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vavale/mysql_sql_injection_cheat_sheet.pdf
    • https://s3.amazonaws.com/xenavuxa/33877383007.pdf
    • https://s3.amazonaws.com/sukobogixe/sukufowatewibodid.pdf
    • https://uploads.strikinglycdn.com/files/a15b3c6f-8667-458e-8033-a3293ade1bfb/wunufubunozejepulewefex.pdf
    • https://s3.amazonaws.com/pibajuwi/enoch_mpianzi_date_of_birth.pdf
    • https://uploads.strikinglycdn.com/files/32e729cd-a080-4395-9aa6-3aa396147dbb/safety_first_grow_and_go_3_in_1_car_seat_installation.pdf
    • https://s3.amazonaws.com/jejulurowev/fema_is_366_test_answers.pdf
    • https://s3.amazonaws.com/jepinebawo/atherosclerosis_book.pdf
    • https://s3.amazonaws.com/fajujiju/4580729385.pdf
    • https://uploads.strikinglycdn.com/files/4626df18-4f25-4f23-a4b4-7972a5dc775b/garmin_nuvi_2597lmt_gps_manual.pdf
    • https://s3.amazonaws.com/xukanomarexumu/28527408306.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_off0000ff1d.bin
96a180cb55d42d0159583ee871ff3695240ecb149c47aba96815d2e1ec338a71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1D 5200 bytes
font_01_sfnt_off000110c2.bin
95ae3d6433b45a6826daf252ac4066b40c22532e9a526f503d924559bdefb879		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110C2 11288 bytes

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