Malicious PDF — malware analysis report

Static analysis result for SHA-256 71eca97a00a8d457…

MALICIOUS

PDF

126.7 KB Created: 2020-12-01 05:56:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3449d21f86420934af8411b9463cbb93 SHA-1: 7f9bed9b14175013964accf26328ae29dfd15469 SHA-256: 71eca97a00a8d457304300913dc2b760852cc53ad49f0099f30dec1ac7d16934
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'traffset.ru', which is likely used to host a phishing page or download further malicious content. The document body, though heavily obfuscated, contains keywords related to performance, suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/aws?utm_term=cache+size+cpu+performance PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419415/normal_5f97ce8d7fc69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402294/normal_5fb794c613b59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_5f92bcaac1d4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380210/normal_5f9388feda579.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/lodazojamuva/powogokovezalevatojufu.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/25585286075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3c0880a-5036-42ea-8881-18c96c520012/avast_web_shield_blocking_internet_access.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/gugedoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/18976976219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7c17f84-d15b-447b-bb2b-917e150372f3/download_delphi_7_lite_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/kijeniwakabojo.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/goxafomalixed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/441e77fc-8ed9-4666-b536-980dd8882ff8/27713685116.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/16938274417.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/excel_academy_arvada_colorado_ranking.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19CF8 5180 bytes
SHA-256: e00f7ef3e354307c7c5574dfc6df6661b847f2be3ee5313b078b94291a3a73f0
font_01_sfnt_off0001ae72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE72 12500 bytes
SHA-256: fd216f2748170ac3a38ffdbd063c1eb863dbeb652a68b9b7abf0a50b5dba0eee
font_02_sfnt_off0001d84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D84D 16108 bytes
SHA-256: 8a1ae476028d70832fdc968a6c6d19f5156f50ad25fd5f37a212d0d1f0ca6cf3

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