Malicious PDF — malware analysis report

Static analysis result for SHA-256 70fc2ef9a07f5945…

MALICIOUS

PDF

82.0 KB Created: 2021-03-01 20:18:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b32986208cdaaf80cc8b438b9911fa3 SHA-1: 74956853965c67fb11b62d5ac48aa452c798145b SHA-256: 70fc2ef9a07f5945f6915a5f5fcee9df0c51684c8d58bf32e777962a2da65c65
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, 'https://zajinet.ru/aws?utm_term=how+many+carbs+are+in+starbucks+almond+milk', which is likely used to redirect the user to a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit users through social engineering, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://zajinet.ru/aws?utm_term=how+many+carbs+are+in+starbucks+almond+milk
    • http://dashcamtopbest.com/what_is_chemosynthesis_simple_definition6eh13.pdf
    • https://cdn-cms.f-static.net/uploads/4444092/normal_5fd2df688ed72.pdf
    • https://cdn-cms.f-static.net/uploads/4387421/normal_602f57cc43330.pdf
    • https://cdn-cms.f-static.net/uploads/4377381/normal_5fe66eec6bafb.pdf
    • https://cdn-cms.f-static.net/uploads/4452400/normal_6024a0b6a0677.pdf
    • https://cdn-cms.f-static.net/uploads/4369783/normal_603ab2a65606d.pdf
    • https://cdn-cms.f-static.net/uploads/4493266/normal_603427f0ce9dc.pdf
    • https://cdn-cms.f-static.net/uploads/4459477/normal_60115fc2e799f.pdf
    • https://static.s123-cdn-static.com/uploads/4375206/normal_5ffdb75dde42e.pdf
    • https://static.s123-cdn-static.com/uploads/4465691/normal_5fde8646a89a3.pdf
    • https://static.s123-cdn-static.com/uploads/4487382/normal_5ff9bf7bd407a.pdf
    • http://samozanyat.info/897273404719uhfr.pdf
    • https://static.s123-cdn-static.com/uploads/4384461/normal_60047c0f8e96b.pdf
    • https://cdn-cms.f-static.net/uploads/4486982/normal_602eed823c177.pdf
    • http://profit-makers.club/84790603833wc6ah.pdf
    • https://cdn-cms.f-static.net/uploads/4470400/normal_6022c9ca2121e.pdf
    • http://giftcard-sale.store/vixefupajefekubozowajsxlrj.pdf
    • http://about-igsupport.com/4631027692u6ak1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://wakagita.rf.gd/duxibafifesikawuzixafi.pdf
    • https://s3.amazonaws.com/pirofopafu/molisevib.pdf
    • https://s3.amazonaws.com/bokexizometun/adjective_to_abstract_nouns_worksheet.pdf
    • https://s3.amazonaws.com/zarevizebi/basic_profit_and_loss_statement_template.pdf
    • http://wanedinak.epizy.com/axure_rp_8_team.pdf
    • https://s3.amazonaws.com/tosevud/load_css_stylesheet_in_html.pdf
    • http://kokibitumoxa.epizy.com/recyclerview_android_example_javatpoint.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f30b.bin
0b2587d3dcf3ade37e341b66e02772d0fc89f3cc980047d3aead8fcee20d4119		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF30B 5328 bytes
font_01_sfnt_off00010516.bin
8c9eb4e73fd7e334502e9547e868dd8d8c7e0fc98773f75c76ada2ed65e556f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10516 11404 bytes
font_02_sfnt_off00012b8e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8E 4324 bytes

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