Malicious PDF — malware analysis report

Static analysis result for SHA-256 c217aac73e1b6f3d…

MALICIOUS

PDF

76.1 KB Created: 2021-02-15 09:56:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: dc25b7dc1d8b0eac23db1bbcb608aba0 SHA-1: 1c6da111e62e1af87b68b4b17c1812ca5526d878 SHA-256: c217aac73e1b6f3d82f3f1948f2f2c23075221262a9d58c4e349604c40eff0aa
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to disposable hosting and redirector infrastructure, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=american+dietetic+association+complete+food+and+nutrition+guide+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4501980/normal_5fc729b971624.pdfIn PDF document text
    • http://idealica-italiauficiale.website/dakimakafulibusijoneko2b0.pdfIn PDF document text
    • https://kufaxaza.weebly.com/uploads/1/3/2/6/132680799/abc589e6.pdfIn PDF document text
    • http://kiwalapisetovu.iblogger.org/aankhon_ki_gustakhiyan_lyrics.pdfIn PDF document text
    • http://teksol.xyz/wuzakafodisoparalege9ia.pdfIn PDF document text
    • http://amsidisi.xyz/moy_5_virtual_pet_game_oyna5bzfz.pdfIn PDF document text
    • https://voropulunonuz.weebly.com/uploads/1/3/5/3/135316946/sites-vuluguwubiwibe.pdfIn PDF document text
    • http://zuwazari.22web.org/mengatur_android_ke_mode_file_transfer_mtp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_601b1c0a21557.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369336/normal_5fe4b230eef24.pdfIn PDF document text
    • https://xazonulukobimov.weebly.com/uploads/1/3/2/7/132712199/gesudujemad-kudubo-poxepomotuwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380883/normal_600a77668fccb.pdfIn PDF document text
    • http://botumizesakukij.iblogger.org/here_comes_the_sun_guitar_sheet_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406771/normal_6010a943d0812.pdfIn PDF document text
    • http://timelessdecorum.com/jivedaw6pad7.pdfIn PDF document text
    • https://wudatoguji.weebly.com/uploads/1/3/4/8/134885495/ddf3943f90.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://zisekajoreva.epizy.com/79764585927.pdfIn PDF document text
    • http://pupitudaxomibi.epizy.com/kuxofozonamuzatefu.pdfIn PDF document text
    • http://golujaxi.epizy.com/free_down_syndrome_powerpoint_template.pdfIn PDF document text
    • http://wotexel.rf.gd/78106723833.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_off0000deab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAB 5344 bytes
SHA-256: 3bdc0d61d48a49c3c6a29ef2c8ab2e04aabe127909fd0b386910f16b63a1e3b7
font_01_sfnt_off0000f0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B4 10436 bytes
SHA-256: 6cefed2641ec72efc69d0c1ed3693e9fe0c20185eef6be798edd14a620e51a67
font_02_sfnt_off00011458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11458 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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