Malicious PDF — malware analysis report

Static analysis result for SHA-256 612661a1023814fa…

MALICIOUS

PDF

68.7 KB Created: 2020-12-23 10:26:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c167d02ca2350576ccc227cfec9ee9e SHA-1: 77be064a90c08df27e606d54b1cc709a8da1da91 SHA-256: 612661a1023814fa10e14e7c2b67ae0eb52e77a27fe65a1052ef9b5b573f29e9
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to wallpaper and a URL that appears to be part of a link farm designed to distribute malicious content. The presence of embedded URLs and the overall structure suggest an attempt to redirect the user to harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/strik?utm_term=enchanted+forest+bedroom+wallpaper
    • https://zodovamerevi.weebly.com/uploads/1/3/4/3/134316438/suzonan.pdf
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/kamojojumenojape.pdf
    • https://xulisonifob.weebly.com/uploads/1/3/2/6/132695361/b4ff87359.pdf
    • https://xeravatiwawu.weebly.com/uploads/1/3/4/6/134603636/d68df363d5b.pdf
    • https://vepemetamat.weebly.com/uploads/1/3/4/3/134354227/3ea385f.pdf
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/ranigipoguxanulovad.pdf
    • https://petizigosi.weebly.com/uploads/1/3/4/9/134903326/c27dcc45.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/toliwudalamem/bronxville_school_calendar_2018-_19.pdf
    • https://s3.amazonaws.com/davubewu/airtel_xstream_app_apk.pdf
    • https://s3.amazonaws.com/dekogamik/susoziw.pdf
    • https://s3.amazonaws.com/nemafu/popcorn_time_apk_android_2020.pdf
    • https://s3.amazonaws.com/xarojapi/autoroute_ila_touba.pdf
    • https://s3.amazonaws.com/sojuravewi/edjing_free_dj_mixer_turntable_apk.pdf
    • https://uploads.strikinglycdn.com/files/1be50696-2c28-4c37-aecf-d752b307f625/mmm_instrumental_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c096.bin
e2945d6e0e833b279be558bf34bcdd9cf4311aac7d266c43fe089d54dc2a8e29		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC096 3028 bytes
font_01_sfnt_off0000cb5d.bin
3a961b43d9096f95ba2d790a22aa4afa2f24913fc2797010c704898a1ac7b58a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5D 5584 bytes
font_02_sfnt_off0000de45.bin
6175eab40357f485b057c762d76f04d54945bf30b5f33ca527b5d97830c2036b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE45 11120 bytes

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