Malicious PDF — malware analysis report

Static analysis result for SHA-256 c502901cf0c05df1…

MALICIOUS

PDF

86.6 KB Created: 2021-03-22 15:52:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a93eb3b589981fcf30b8ece9490f9fa6 SHA-1: 6eb8618a43aa90417e5618fe87499a418024c70c SHA-256: c502901cf0c05df1e0065e8c40d68aa79d1f586385348d91a2c47def0d4eaf32
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, indicating a link farm or redirection strategy. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic point towards an attempt to drive traffic to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://soxebez.ru/wix?keyword=come+ye+souls+by+sin+afflicted+youtube PDF link annotation
    • https://bugomalaked.weebly.com/uploads/1/3/5/3/135324661/lojaniwo_pelepukaze.pdfIn PDF document text
    • https://keregejuvuja.weebly.com/uploads/1/3/4/3/134345288/2945e8.pdfIn PDF document text
    • https://doleroxewaforud.weebly.com/uploads/1/3/4/3/134322791/lafixifa_solesato.pdfIn PDF document text
    • https://soxigirotum.weebly.com/uploads/1/3/0/9/130969819/43c77d0c2.pdfIn PDF document text
    • http://galapaniwub.iblogger.org/nanunodi.pdfIn PDF document text
    • https://kesizizuju.weebly.com/uploads/1/3/4/3/134384541/8122892.pdfIn PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/a277e8c9064.pdfIn PDF document text
    • https://polavimiwusirew.weebly.com/uploads/1/3/2/6/132681763/8346736.pdfIn PDF document text
    • https://nubapatis.weebly.com/uploads/1/3/4/0/134095887/2277e19ed6ab.pdfIn PDF document text
    • https://nometoxuf.weebly.com/uploads/1/3/4/2/134266561/lasozorakine-roforomat-vitiv-sedigivepafakuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dijijesuwaxon.epizy.com/wafojefuvujoxalili.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/aha_ischemic_stroke_guidelines.pdfIn PDF document text
    • http://nudenagazosizav.epizy.com/nova_cracking_the_code_of_life_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/buffy_season_3_episodes_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/stihl_leaf_blower_vacuum_review.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/bradesco_prime_app.pdfIn PDF document text
    • http://mabagojovas.epizy.com/how_to_draw_anime_step_by_step_pictures.pdfIn PDF document text
    • http://pilomewolax.epizy.com/degrees_of_comparison_worksheet_elementary.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/69266694582.pdfIn PDF document text
    • http://kotasivira.rf.gd/bink_s_sake_piano_sheet.pdfIn PDF document text
    • http://tewidunutazi.rf.gd/85761154070.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_off0001130d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130D 5220 bytes
SHA-256: 9a7059a8ec47e053199bce6c6442e4f9ee474af03a7a0cddd181052ff44c72bf
font_01_sfnt_off000124c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C3 11372 bytes
SHA-256: def1e656a47a3aaf258d7feb495938d0b3c04cedb26e5171e477ce89eaf30a54

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