Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2d04ea448145fb…

MALICIOUS

PDF

75.5 KB Created: 2021-02-13 19:43:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 318ba9258d09421c60f202f6766e9db2 SHA-1: 72597b08738ff90a78d6609bd5113c019e77793a SHA-256: 1a2d04ea448145fb1836c99f50597ccb810b3a780c53bb34e4236d740bd41ee0
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links designed to redirect users to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The primary lure appears to be related to 'apk asphalt 8 hack money', suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to drive traffic to potentially harmful sites.

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://crophysi.ru/123?utm_term=apk+asphalt+8+hack+money In PDF document text
    • http://ersoil.fun/65773322258nqfju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422893/normal_600e4f66e0278.pdfIn PDF document text
    • http://gufutaca1.xyz/56245184848h9p0i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_6026ab391e45b.pdfIn PDF document text
    • http://fortysgjdk.fun/top_stock_android_wallpapers_2ocz69.pdfIn PDF document text
    • https://cdn.sqhk.co/daxozazon/hb6xyic/mx_video_player_pro_apk.pdfIn PDF document text
    • https://kowagazobavov.weebly.com/uploads/1/3/0/8/130874359/ledoroveg-jasodupux-wuwil-pugamomewe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365563/normal_60020b7fc00dc.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/3wjdgJS/uefa_golden_boot_winner_2020.pdfIn PDF document text
    • http://biomaniks.website/ahpra_international_nurses_registration_formdf5pd.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/medaliwifufugel/boi_account_opening_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/officejet_2620_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/wozovedowebiwe.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/7933333970.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/always_on_display_apk_plugin.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_off0000eb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB92 5428 bytes
SHA-256: 5a0efd0030b935426d5586b7bc717e073ae06a371f5a6c3e37d6ca023ab30d8c
font_01_sfnt_off0000fdf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF3 10372 bytes
SHA-256: 7b30a43f5861851466e8abcec87c3c8fa6ff125dca2939b837ffb0b96f7aec40

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