Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa839bbd182e0418…

MALICIOUS

PDF

76.4 KB Created: 2020-12-26 13:32:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3e6bc385916aed6cb891404a2e91612e SHA-1: ab0f08acbea11cdc5dd0e1ff2c6ad66165e82fb8 SHA-256: aa839bbd182e0418b717696a77eeab77da0814085815bd6f894343128804a3d8
156 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and a heuristic firing for a PDF link farm, indicating an attempt to redirect users to external sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/aws?utm_term=tamil+album+gana+song+video PDF link annotation
    • https://lopamazaveseku.weebly.com/uploads/1/3/4/6/134643240/wanobib.pdfIn PDF document text
    • https://mugafurevokez.weebly.com/uploads/1/3/4/8/134894013/83cf0268.pdfIn PDF document text
    • https://dudezixibuwido.weebly.com/uploads/1/3/4/5/134529197/c6450e83bb8b903.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/77f1b48e-55af-4452-ac2f-d43d9b515aa9/sahnenin_dndakiler_kahramanlar.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/rezoxogowikuf.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/wufutexovojimera.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/jazz_hip_hop_beats_instrumental_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/xijulidodakonabulopofag.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/beechcraft_baron_58_maintenance_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/hey_there_delilah_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e70c68-1b56-4689-84c6-c69f309fdfc3/gta_san_andreas_unblocked_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/463fa135-42a0-472e-8a66-e365c33e2918/55277266042.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6a21c1f-755e-4048-9731-90942b159a12/le_pronom_tonique_exercices.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/application_letter_samples.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_off0000ec8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8A 5200 bytes
SHA-256: 8b8dd68a5f2b7745d7f6ba6d73a88f33a1fb90828c9e73c023ffa2c59f4beaad
font_01_sfnt_off0000fe2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2E 11616 bytes
SHA-256: 6c3b5f5bbd048a7bdb920fe5531afaa60c2fd411757497b66f08072fbf54a828

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