Malicious PDF — malware analysis report

Static analysis result for SHA-256 056cfbde014c2355…

MALICIOUS

PDF

73.9 KB Created: 2021-03-20 06:08:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 827adec82a3710fd83d9bec8681921a0 SHA-1: 350b6289e59bb9f0deaeb6aa973418a77a76e62f SHA-256: 056cfbde014c23556e490371982de68f0818cb58a2cd02aa7ee24256a96ce253
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs and the heuristic findings point towards an attempt to redirect users to potentially harmful websites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/aws?utm_term=adobe+photoshop+elements+13+tutorials+youtube PDF link annotation
    • https://vazatevetag.weebly.com/uploads/1/3/0/8/130874289/wefur.pdfIn PDF document text
    • https://dulewidojupetor.weebly.com/uploads/1/3/2/6/132695372/gidovazasovumet-firadomifenoro.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/53396624340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411001/normal_6035f0f48ddaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374360/normal_5feb714c39ded.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/en_nombre_de_la_rosa_pelicula_completa_gratis.pdfIn PDF document text
    • https://vuvoxuwamulixa.weebly.com/uploads/1/3/0/7/130739220/5684944.pdfIn PDF document text
    • https://supogile.weebly.com/uploads/1/3/1/6/131606666/wesesamelulog.pdfIn PDF document text
    • http://romeital.space/2010_lexus_es_350_sedancfbw3.pdfIn PDF document text
    • http://snegny.com/how_to_use_firefly_vaporizervu03x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480581/normal_5fd859166ae17.pdfIn PDF document text
    • https://salupoxegiras.weebly.com/uploads/1/3/5/9/135961269/funofekorekidodatum.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/rilexazejuzovep/how_to_reset_tws_f9_earbuds.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/wagegamadetapume.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/5409665756.pdfIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_7e40580ba7f147fba3b0b220ac8179d9.pdf?index=trueIn PDF document text
    • http://nozozuwovore.atwebpages.com/synonyms_and_antonyms_worksheets_grade_7.pdfIn PDF document text
    • http://fixidil.atwebpages.com/70109544933.pdfIn PDF document text
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_25cc250ca70248e4a9e6c94f33aafe90.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xomepixo/addictive_drums_2_full_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_off0000e209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE209 5648 bytes
SHA-256: e10e58456678d71818b156f118be6ad6b06ac1519d899b3c03b7e2a9b0755db7
font_01_sfnt_off0000f518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF518 10876 bytes
SHA-256: 8529b75b0adc1b9cfda9b7ebc041cc74416992c4b99a4208567fd4e8b16f018b

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