Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a93c43e24724c0…

MALICIOUS

PDF

83.8 KB Created: 2021-03-16 08:23:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 9eea78da7e3ad9561ad68334aaceb0d8 SHA-1: ef8a28d92d8af417fce48c9bd7c144033dc2947b SHA-256: e0a93c43e24724c083ac24d14af6c9d3bb7f76184c8a1b43ae7e40866161ccb3
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 likely part of a link farm designed to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it is designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/award?keyword=boolean+function+complexity+jukna+pdf PDF link annotation
    • https://sikevitexin.weebly.com/uploads/1/3/5/3/135301450/wipawugeketo-fesaji.pdfIn PDF document text
    • https://nazoxuja.weebly.com/uploads/1/3/2/8/132814973/setifop.pdfIn PDF document text
    • https://cdn.sqhk.co/kufagilan/jhe7aih/popelemibemogep.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/jfly7e5/83329571392.pdfIn PDF document text
    • https://cdn.sqhk.co/nudadubuju/hatjfA8/griselda_blanco_documental_discovery.pdfIn PDF document text
    • https://cdn.sqhk.co/wifilivemij/ekN2ghL/airplane_games_free_online_unblocked.pdfIn PDF document text
    • https://nuzoligul.weebly.com/uploads/1/3/3/9/133997434/cf2d63d.pdfIn PDF document text
    • http://sakivometo.medianewsonline.com/volar_sobre_el_pantano_audiolibro_descargar.pdfIn PDF document text
    • https://mujunuduxur.weebly.com/uploads/1/3/5/3/135327440/00d95448.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/tikoweravisixu/klb_chemistry_book_4.pdfIn PDF document text
    • https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_2a5ac24697214d4db6127aa0963e83e4.pdf?index=trueIn PDF document text
    • http://lojibovel.myartsonline.com/what_are_the_components_of_a_functional_behavior_assessment.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/daily_routine_english_sentences_with_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/28554236592.pdfIn PDF document text
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_de78eff59c294003a2620e85328e5d57.pdf?index=trueIn PDF document text
    • http://geforagegi.atwebpages.com/83846614373.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/delosowopilagobiwasoges.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/33514177391.pdfIn PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_641b8645e41b46978a4f7bb507600670.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/bogigezofotuvamefuved.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/bill_hader_dancing.pdfIn PDF document text
    • http://nubibubimalepik.atwebpages.com/babopupuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/anywhere_anytime_song.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_off00010777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10777 5384 bytes
SHA-256: 100d378a9f25eab1305a6b75eeca996a0415c7be13dc88c26fe0bf0e96b69a59
font_01_sfnt_off000119d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D4 12356 bytes
SHA-256: d2692bc2ac9bedf32f34f524b96d6328e490f359eb279b185e24aa6037bd0fbf

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