Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2c5d6dda986e2d…

MALICIOUS

PDF

89.8 KB Created: 2021-05-17 01:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2ef44f567c9c7ba7adcb9a7d4d8cbc80 SHA-1: a3aad51459faf42d1e7b145dd7b0d13623c25c10 SHA-256: 5e2c5d6dda986e2d14fee47c5bd29a55efb3ec4229c69306d921d787d74762d3
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are structured to appear as search results, indicating a link farm or SEO spam tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

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://golowaki.ru/strik?utm_term=best+lawn+trimmer+with+attachments PDF link annotation
    • http://savineme.mywebcommunity.org/acceleration_practice_problems_key.pdfIn PDF document text
    • https://govovoladadivaz.weebly.com/uploads/1/3/5/3/135304945/2fd3c02b6d74.pdfIn PDF document text
    • https://vomoxolakixirum.weebly.com/uploads/1/3/1/4/131438067/6968163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405420/normal_5feaed0d30455.pdfIn PDF document text
    • http://rupazaduxil.mywebcommunity.org/technical_drawing_for_fashion_basia_szkutnicka.pdfIn PDF document text
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/semaguzusetid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450430/normal_600fda71e4da6.pdfIn PDF document text
    • http://xubajur.mygamesonline.org/komofenofesov.pdfIn PDF document text
    • https://manabuvajej.weebly.com/uploads/1/3/4/8/134847277/6501337.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/fedure/h_264_dvr_software_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c93ba221-d8ed-4e9b-93d8-1ce191e28fcb/symptoms_of_high_functioning_autism_in_4_year_old.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/truck_simulator_usa_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/network_access_control_software_free.pdfIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_120aec2da3af4dcd93c87910e8ef7f8d.pdf?index=trueIn PDF document text
    • https://0e67983c-e844-40c9-b604-97311ec94efe.filesusr.com/ugd/6e13d9_45e864e0c7aa40fd9b5ae72014943f87.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e7c9700-49fe-4f68-abde-0265e5ef69ef/21331136470.pdfIn PDF document text
    • https://c24d0846-efa5-4754-a822-a7dc8f88f2d4.filesusr.com/ugd/7b2abd_6e5b544624f34f0fb6544d9ec0506a87.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kigavanus/22940841529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47a4fadf-a867-4b87-80de-6fd866d00eda/nepivawevudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/245a5861-b162-43f0-8980-4e9ac84c9011/how_much_does_a_special_ed_teacher_assistant_make.pdfIn PDF document text
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_29936980780f4b7a8d7ad7602ebe385d.pdf?index=trueIn 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_off000122e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E5 5180 bytes
SHA-256: c8969ee3ee9e9c4521d8758e2849fe26c80afcfa1d3f45fda0c99d3a6604705a
font_01_sfnt_off0001346a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1346A 11128 bytes
SHA-256: f348514b6f6f378caad31eebb744025b8dbb89b1a15ea7864e963d23f06e63e6

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