Malicious PDF — malware analysis report

Static analysis result for SHA-256 578d764a9109fd2e…

MALICIOUS

PDF

82.9 KB Created: 2021-01-29 18:01:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 04c017d2c9996a771074c3af2d325414 SHA-1: 678059c9d502e7b7864e3232dbcb5b1962b3c281 SHA-256: 578d764a9109fd2ec69c56e6071e3de880a05cff809bcf2f699fece3a1d817e8
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, pointing to various PDF documents. One of the primary URLs, 'https://traffnew.ru/wb?keyword=idle%20king%20tycoon%20clicker%20manager%20simulator%20games', suggests a lure for traffic generation or potentially phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://traffnew.ru/wb?keyword=idle%20king%20tycoon%20clicker%20manager%20simulator%20games PDF link annotation
    • https://cdn.sqhk.co/pigajifaw/ifZjf5p/video_to_gif_converter_software_download.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/hcjh9KZ/libesiwubaliza.pdfIn PDF document text
    • https://pegutezupo.weebly.com/uploads/1/3/2/7/132740329/lorutog_tutunese_xumuv_zidiminunefaze.pdfIn PDF document text
    • https://lewaxirilukuxod.weebly.com/uploads/1/3/0/8/130813115/9716387.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarasam/ij3jeY7/matewan_movie_questions_and_answers.pdfIn PDF document text
    • https://lidafeli.weebly.com/uploads/1/3/4/6/134683499/xamev-zubomebedimi.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/zhjjc3o/short_history_of_medieval_philosophy.pdfIn PDF document text
    • https://cdn.sqhk.co/bobimugura/Rjap3hb/danapulotuvu.pdfIn PDF document text
    • https://cdn.sqhk.co/xavonepez/3HC9GJ7/jevawuwojajovoditamu.pdfIn PDF document text
    • https://melesanej.weebly.com/uploads/1/3/1/1/131163783/dofofote-befujajunina.pdfIn PDF document text
    • https://cdn.sqhk.co/rirerujel/gnRhdFV/lemovunomuvurumapakedelor.pdfIn PDF document text
    • https://cdn.sqhk.co/relaberof/0ijbOas/68857909963.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/faxaxos/django_dashboard_template_free.pdfIn PDF document text
    • http://fumaresaxebikab.epizy.com/povokejepuk.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/summer_holiday_bucket_list_template.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB5 5876 bytes
SHA-256: 12106735c9d1727e24120b1d9158165318c628b19fed95d854f7255706cea5b5
font_01_sfnt_off0000e3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EE 5364 bytes
SHA-256: 34be37c31f557e647d25401757759bdba6cd810a77bf97340fc8eebc135d8448
font_02_sfnt_off0000f617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF617 3360 bytes
SHA-256: ec3e8fcaf57a76f269ed37417188e28782fe8099260cacf72c141ce0da55baa2
font_03_sfnt_off000103d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D3 10464 bytes
SHA-256: 4a737035cb61e61d8172812c8caaccb2a9149493fbb6ae10854ed81b949fc2c3
font_04_sfnt_off000127f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F3 16212 bytes
SHA-256: efa10eb016e3f3b0b4b9ca88735192a2169c3e2ea1838fdfae102cdad0ae9fb6

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