Malicious PDF — malware analysis report

Static analysis result for SHA-256 413d9f1904c1e32e…

MALICIOUS

PDF

74.9 KB Created: 2020-12-28 08:49:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 835161f74bcc739c7458a1075793f083 SHA-1: be26f40d77290b3977da252508f39c882a94fc2a SHA-256: 413d9f1904c1e32e7d21bca255b377e210807973b4335bf44bab07557f81b29a
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and a machine learning classifier, indicating malicious content. It contains numerous external links, with a significant number pointing to a link farm, suggesting an attempt to redirect users to malicious sites. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/strik?utm_term=low+oxygen+levels+covid+19 PDF link annotation
    • https://cdn.sqhk.co/dorusafe/fgjRhc2/lightseekers_tarot_deck.pdfIn PDF document text
    • https://cdn.sqhk.co/kufedefivuvu/UgAbq3J/cross_stitch_masters_apk.pdfIn PDF document text
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/litamagul.pdfIn PDF document text
    • https://wimolakerozer.weebly.com/uploads/1/3/4/4/134448160/1804737.pdfIn PDF document text
    • https://cdn.sqhk.co/bazopaxepifu/VREiije/rorukoxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/resisuna/mexivezob.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/lepixutetiraf.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/delivery_order_template_xls.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/ginid.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/badofaxasinaseg.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/buku_spm_biologi_sma.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/zebavogapepepiro.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/doraemon_title_song_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/uidai_aadhar_without_otp.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/zuvekepafexegakonisul.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/lubalizada.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/el_alcoholismo_es_hereditario.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_off0000dbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBF 4980 bytes
SHA-256: db7388187c1b110825864ce604fabdce170bcc78643bc58289909e78f485a718
font_01_sfnt_off0000ecdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDC 10356 bytes
SHA-256: aac34f3e1713e3bc2b05e8528117e3e27569e38bc8c21bded41d8d793a7d3be1
font_02_sfnt_off00011014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11014 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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