Malicious PDF — malware analysis report

Static analysis result for SHA-256 490d18caa598e5f1…

MALICIOUS

PDF

76.4 KB Created: 2021-04-22 03:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e2deb4e7acf9078541c16ec67c84f624 SHA-1: aca2cf896c94789b919ad505e8a0a5cef4c6de8b SHA-256: 490d18caa598e5f1f8fc2c58135858d7981823fafccceef224fb88279862fa7b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicating a link farm designed to redirect users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URLs and the PDF_SEO_LINK_FARM heuristic confirm the document's purpose is to drive traffic to external resources.

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://lozipotod.ru/strik?utm_term=how+many+carbohydrates+in+chick-fil-a+grilled+chicken+nuggets PDF link annotation
    • https://dutilugamon.weebly.com/uploads/1/3/5/3/135301630/rezowa.pdfIn PDF document text
    • https://cdn.sqhk.co/bozawenibiwa/9009HEz/70897555242.pdfIn PDF document text
    • https://cdn.sqhk.co/xegigujatefa/jiwsgcA/rotator_cuff_surgery_cost_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/matelasoguje/Hhh0LkJ/the_hindu_business_line_epaper.pdfIn PDF document text
    • https://cdn.sqhk.co/sezunofubuzi/e4gm3gf/pobivupepodowikusejab.pdfIn PDF document text
    • https://cdn.sqhk.co/vonezositixi/ehcdifJ/76074837215.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/Ifiiif5/98784658261.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwetebep/yhh2yia/chennai_super_kings_ipl_match.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/fgdje77/police_car_drift_race_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jejefudebuxi/ehhLjji/77934103333.pdfIn PDF document text
    • https://cdn.sqhk.co/dakagugi/ggOjhhe/hay_days_2020_atkinson_ne.pdfIn PDF document text
    • https://pikoxujedogusu.weebly.com/uploads/1/3/4/6/134665618/korubisafozu-wowali.pdfIn PDF document text
    • https://cdn.sqhk.co/dufimogemeka/a3h3bk4/66532612424.pdfIn PDF document text
    • https://cdn.sqhk.co/jupemuwaze/eijRuR4/fesoranajit.pdfIn PDF document text
    • https://doxuxipineza.weebly.com/uploads/1/3/0/7/130740192/113a11df.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/hhjdGjf/64914349477.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/CNgjib1/alan_walker_faded_sing.pdfIn PDF document text
    • https://cdn.sqhk.co/kasavakujosi/c3iipOy/how_to_change_my_vodafone_voicemail_pin.pdfIn PDF document text
    • https://cdn.sqhk.co/rokajoten/jbHXiaV/29946499154.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/ihegfRz/furugimeniwotu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BD 5824 bytes
SHA-256: 4bee3e29752586e59a0c28cf3716e798deef082de6fdaa6fcf74efee605de7ab
font_01_sfnt_off0000fb84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB84 11960 bytes
SHA-256: fcb112630497c519a2c0c2c6e3e575e59c6ff3db4101193cade33ba4f99c9494

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