Malicious PDF — malware analysis report

Static analysis result for SHA-256 14dd5a35a0a007c1…

MALICIOUS

PDF

84.9 KB Created: 2021-03-10 21:09:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7a20904eefe90f106688081b8b67e0b6 SHA-1: ea50f53959379f6d98836905ddbd2440afb84f1d SHA-256: 14dd5a35a0a007c1ead884b54e640a124f363e92b97229752ed91cce3edcc43b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to potentially malicious domains, suggesting it functions as a link farm or part of a phishing campaign. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to redirect users to malicious sites for payload delivery or credential harvesting.

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
  • 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://lozipotod.ru/wix?keyword=sf6+polar+or+nonpolar PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449973/normal_5fd647c7c1c9d.pdfIn PDF document text
    • https://pawawejovotete.weebly.com/uploads/1/3/2/8/132814611/7630425.pdfIn PDF document text
    • https://nalodewemutut.weebly.com/uploads/1/3/1/1/131164475/079d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468814/normal_5ff24a44ae5be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465145/normal_5ffde5c2e9a4c.pdfIn PDF document text
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/61fd2.pdfIn PDF document text
    • https://bevotiwi.weebly.com/uploads/1/3/1/4/131437753/zedopesurimase-sisetutasage.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426085/normal_5ff3ff4100db0.pdfIn PDF document text
    • https://vufevilasok.weebly.com/uploads/1/3/4/3/134314299/7dfb3ff21094.pdfIn PDF document text
    • http://nusezuretoti.scienceontheweb.net/orgrimmar_riding_trainer_wotlk.pdfIn PDF document text
    • http://kuzojud.66ghz.com/power_archiver_for_windows_7.pdfIn PDF document text
    • http://tilikef.mygamesonline.org/zuteb.pdfIn PDF document text
    • https://mutikotamibe.weebly.com/uploads/1/3/0/8/130874320/9020444.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/sezebepit/weber_smokey_mountain_14_brisket.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/best_picture_collage_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/sozugalukiduvimiwuz.pdfIn PDF document text
    • http://vomajifinudunu.epizy.com/excel_macros_programming_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/autocad_3d_plant_2018.pdfIn PDF document text
    • http://jekidosokun.epizy.com/afghan_pashto_songs_mp4_free.pdfIn PDF document text
    • http://sefimuzuxenuxa.rf.gd/android_accelerometer_background_service.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/hitman_blood_money_highly_compressed_free.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_off00011211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11211 4976 bytes
SHA-256: 355c52adeacd529310a9d72264a71d4333e9a014a6ca4ab10f95ca661eb377ef
font_01_sfnt_off0001230a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1230A 10472 bytes
SHA-256: a77fd512de65278de67ee153e5f1e8e7f509851c75b059fbdc4fe2cf1b7f6f83

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