Malicious PDF — malware analysis report

Static analysis result for SHA-256 b224bb55efbff7b6…

MALICIOUS

PDF

81.8 KB Created: 2021-02-21 06:59:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ac196293ba34f78f9854aa9931f3e7c4 SHA-1: 88781a0193963079132d3baaf3e12cdc395406d1 SHA-256: b224bb55efbff7b684d7905e007b838443e57835705e256b747be114022813f6
184 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to notary license renewal. The presence of numerous links hosted on disposable domains further indicates a phishing or malicious redirection attempt.

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
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wb?keyword=can%20i%20renew%20my%20nys%20notary%20online In PDF document text
    • http://wadixokup.22web.org/heart_failure_guidelines_2019_ppt.pdfIn PDF document text
    • https://rapironid.weebly.com/uploads/1/3/1/3/131398378/7385ab6690.pdfIn PDF document text
    • https://cdn.sqhk.co/fusozuwalas/Fjgfghn/digital_camera_rechargeable_battery_price.pdfIn PDF document text
    • https://sipitajopidegol.weebly.com/uploads/1/3/1/4/131453448/4188a7.pdfIn PDF document text
    • https://jupavovol.weebly.com/uploads/1/3/4/3/134314217/1544ca4223355.pdfIn PDF document text
    • http://zatawonilar.iblogger.org/naxuwuwumaxovadujam.pdfIn PDF document text
    • https://cdn.sqhk.co/dodipenameki/Rn1ievg/rebag_reviews_for_sellers.pdfIn PDF document text
    • https://cdn.sqhk.co/lanuniwa/hahijge/36421199709.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369153/normal_60006bb10d4cb.pdfIn PDF document text
    • https://natapoja.weebly.com/uploads/1/3/0/8/130813782/katotaxejeti.pdfIn PDF document text
    • https://cdn.sqhk.co/mufipofunup/hp3CEia/21400441152.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482415/normal_5fd1825f42800.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/velemiti.pdfIn PDF document text
    • https://sopivumebisul.weebly.com/uploads/1/3/1/4/131413603/mawijon_bebebefodaxuwok_fasonopodate_vebegosafivojam.pdfIn PDF document text
    • https://pemiliruvobavex.weebly.com/uploads/1/3/0/7/130739389/rukipojin.pdfIn PDF document text
    • https://netevidogewe.weebly.com/uploads/1/3/4/7/134715311/8389487.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zisoramemib.rf.gd/point_slope_form_calculator_two_points.pdfIn PDF document text
    • http://zegifuf.epizy.com/linkedin_summary_template_for_hr.pdfIn PDF document text
    • http://wuparol.epizy.com/xilijifelonux.pdfIn PDF document text
    • http://pizoxuwa.epizy.com/dd_4e_warlock_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF691 4836 bytes
SHA-256: 533ff117558c6346a7dd2f09fab808b72be01069a69f5dafdb4f9101a2097af6
font_01_sfnt_off000106fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FA 10544 bytes
SHA-256: f510f8df00f0755677b69d49b305b82b1f56f051af4849a2c20147cf265c3c14
font_02_sfnt_off00012b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B29 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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