Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60cbcdb915785b2…

MALICIOUS

PDF

95.2 KB Created: 2021-02-24 20:04:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ec124c36877528fb5aff24ef6fafa0aa SHA-1: 68366323874609a1542486a6c0994dc868ddfbdc SHA-256: a60cbcdb915785b26a704f46bf82b3686bace4bcdddbed06e42504ea44f05be4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, indicating a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URLs suggest it is designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://leonvi.ru/123?utm_term=how+many+chapters+are+in+the+vampire+diaries+the+awakening PDF link annotation
    • https://sanituwinera.weebly.com/uploads/1/3/1/3/131379206/lisalebof_nerezuxuno.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366627/normal_6007bc51b7187.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/jcujchj/the_walking_dead_season_one_apk_free_download.pdfIn PDF document text
    • https://resonorur.weebly.com/uploads/1/3/4/8/134874279/xexifaxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420034/normal_5fca5e9887df2.pdfIn PDF document text
    • https://rapironid.weebly.com/uploads/1/3/1/3/131398378/zawilaz.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/58199649143.pdfIn PDF document text
    • https://gugajapu.weebly.com/uploads/1/3/5/3/135330564/bexam.pdfIn PDF document text
    • http://desokore.medianewsonline.com/30328413146.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/qu_es_un_liderazgo_organizacional.pdfIn PDF document text
    • https://vobikonim.weebly.com/uploads/1/3/5/3/135390296/bebikog.pdfIn PDF document text
    • https://jofufibiwew.weebly.com/uploads/1/3/5/3/135347649/tosivupitenam-sibitogovej.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/xakajoziwibi/latest_betpawa_app.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/excel_compare_data_in_two_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/palisemuzotovoxof.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/yaesu_ft_857d_full_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/amrit_maan_new_song_gaddi_kali.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B88 2900 bytes
SHA-256: 10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
font_01_sfnt_off000135cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135CB 5732 bytes
SHA-256: 5a643f8a61bb9c2b1d12ebbf2a4084e0469e1c2258fa748b271d0b8ce8fd082c
font_02_sfnt_off0001493b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1493B 10996 bytes
SHA-256: c63c499932419104f982ee2df55ab8484a6079b9a9fbdc114bc69bdc963acd18

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