Malicious PDF — malware analysis report

Static analysis result for SHA-256 d121eb894bc18f37…

MALICIOUS

PDF

78.8 KB Created: 2021-03-20 18:04:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 55b378df37e640d0d022603fe5b87df8 SHA-1: d5d84c4d9b9c0bf2e87debea053d2b6011077201 SHA-256: d121eb894bc18f371406c70d5bb69b3b4b931548a1ef2c184c891d77b5deb2cc
192 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for a redirector link and ML classification. The embedded links and the presence of a 'download' button suggest a phishing or malware distribution attempt. The document body, though heavily corrupted, contains text related to 'download', reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=marathi+to+english+barakhadi+pdf+download In PDF document text
    • http://1eyvgo.xyz/11336848498wer4k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403276/normal_6040691f9170c.pdfIn PDF document text
    • http://vuvajujuli.mygamesonline.org/circulatory_system_project.pdfIn PDF document text
    • http://memokepudag.iblogger.org/doruwenudenolelafi.pdfIn PDF document text
    • http://ketotreno.buzz/blue_dachshund_for_salerf8x3.pdfIn PDF document text
    • http://wugumonisukanib.sportsontheweb.net/34911330667.pdfIn PDF document text
    • http://fortuneo.best/canon_powershot_sx510_hs_manualoulwa.pdfIn PDF document text
    • http://ewwe.space/comfortmaker_rpj_ii_owners_manualtin1x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490122/normal_6015a9071421d.pdfIn PDF document text
    • http://teragoronowaki.iblogger.org/marezuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408706/normal_5fcc91cd77820.pdfIn PDF document text
    • http://meetlait.pro/10512833883tuf1y.pdfIn PDF document text
    • http://muzesumulel.getenjoyment.net/baby_bestiary_2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dafuwinev.myartsonline.com/general_motors_diet_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bacf865-84ce-495d-89fe-7cb084ed57eb/64234899621.pdfIn PDF document text
    • http://moxutomib.rf.gd/12558837822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d8b51be-6104-40ac-963b-ca160dc14121/ninazimefekif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b84dd35f-2472-4576-a890-b2681a8c5c3e/the_spectacular_now_2013_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f2fc268-cbc3-4bf1-bdb0-06c08aa893db/66211532595.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/78828821567.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_off0000f529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF529 5604 bytes
SHA-256: cd705059717ef86fc6fee59b2a290a7db4caf7ad70f4e265945f563dc43c1cad
font_01_sfnt_off0001084b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084B 10820 bytes
SHA-256: 8ee46e9670da41e460834d5f027b64110b120890ef1d6d56a541e22b21ecb1ae

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