Malicious PDF — malware analysis report

Static analysis result for SHA-256 3554e7add3b9796e…

MALICIOUS

PDF

76.4 KB Created: 2021-01-03 06:29:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 87d4ad81dcb9a0b907563a3a3852d0d0 SHA-1: 787f7f125118c942026f8bf7ec9c966111c35e6c SHA-256: 3554e7add3b9796ef4d6125831432435772447e875a78ee2782c1c064e400ea7
214 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'https://gettraff.ru/aws?utm_term=antivirus+premium+mod+apk'. The document body, though heavily obfuscated, contains text fragments suggesting a lure related to 'antivirus premium mod apk'. The presence of a large number of external PDF links, some pointing to S3 buckets, indicates a link farm designed to distribute malicious content or engage in SEO manipulation for phishing.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=antivirus+premium+mod+apk In PDF document text
    • https://gamaditer.weebly.com/uploads/1/3/4/5/134583337/duziwupeka.pdfIn PDF document text
    • https://bulodogezuso.weebly.com/uploads/1/3/4/8/134868115/948ca61.pdfIn PDF document text
    • https://vekerarefatada.weebly.com/uploads/1/3/4/8/134868636/sunedesurogawax.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/19hcEjj/highway_prado_racer_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rifasidajika/qChhgeg/30282832588.pdfIn PDF document text
    • https://sopoxovolofu.weebly.com/uploads/1/3/4/5/134509961/6c83f5e63b.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/sazixipame/jotizeliwikejapedokibub.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/84938092750.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/calculating_percentages_worksheet_ks2.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/ntr_biopic_movie_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/19842868623.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/insertional_achilles_tendonitis_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/gapaxuxojikudopaginedeja.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67A 5188 bytes
SHA-256: 5f70edef0b431027e7f6559462bca5d1a50ff6d75d9d78732089c4a3b24961cf
font_01_sfnt_off0000f80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80F 13516 bytes
SHA-256: 9fef838a30d1bb99c3cadaf77c0ec4d5f316c07819b32125e18ad87f83ccd077