Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee02b66ea19458b8…

MALICIOUS

PDF

94.9 KB Created: 2021-03-14 03:28:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 32a84f78016102c21f7bd71233acb42d SHA-1: ed035ed1f9e894c5780fef044e3b6afda37c5a01 SHA-256: ee02b66ea19458b8affb9050aff1db56185db3da33cda52fbb99c17049adb781
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document contains numerous external links, forming a link farm, with the primary malicious URL being https://mezovuduw.ru/wix?keyword=copper+sulfate+hydrate+lab+answers. This suggests the document is designed to redirect users to potentially harmful websites under the guise of providing lab answers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://mezovuduw.ru/wix?keyword=copper+sulfate+hydrate+lab+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389074/normal_603b6e0dbb7f4.pdfIn PDF document text
    • https://vufepuxo.weebly.com/uploads/1/3/4/5/134522835/gebuleroxukaxeba.pdfIn PDF document text
    • https://nusuxoxoli.weebly.com/uploads/1/3/2/7/132710665/mokovomopuke_bomuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427514/normal_6000c930994cc.pdfIn PDF document text
    • https://kumexaper.weebly.com/uploads/1/3/4/8/134882622/beludubenogu_watope_titesinomi.pdfIn PDF document text
    • https://nukarudurarera.weebly.com/uploads/1/3/1/3/131380042/bogupisumozixiteg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375070/normal_6022917f6ab21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492555/normal_600273967bb19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466173/normal_604bcb35f1f48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425492/normal_602424ab5565f.pdfIn PDF document text
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/kewerofimozadup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390057/normal_600804777ab72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_6042c7165d73a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447466/normal_5fd6367fae711.pdfIn PDF document text
    • https://kaketoxemi.weebly.com/uploads/1/3/5/9/135989659/21d3d7192c19992.pdfIn PDF document text
    • https://dujomujur.weebly.com/uploads/1/3/4/8/134883281/jupebudol-fowisozaf-kuvizewer.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/gezetega/bhojpuri_video_songs_new_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/88445506278.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/dosobaniranilegivoviv.pdfIn PDF document text
    • http://nufipixara.rf.gd/who_is_the_best_car_salesman_in_the_world.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/tudepomarulof.pdfIn PDF document text
    • http://vonanovab.epizy.com/fugagugexa.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/jajipivezedovawodok.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_off000134b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B0 5368 bytes
SHA-256: c4863679a0a312efb04e94e38158a326756d83a4b1725ff0cdc7d06794bfb994
font_01_sfnt_off000146f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146F7 11604 bytes
SHA-256: 115b878a0694b8919d3baadd1fc64ebbf33c23a786e90f2f6215a5b341a9016f

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