Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7e3b13767ca9cf…

MALICIOUS

PDF

90.6 KB Created: 2021-03-19 06:35:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dff13e0953b12627256b61517ea1d5d SHA-1: c903c3174d433f0db35d874fcd8fc8122e85c572 SHA-256: fa7e3b13767ca9cfd22dc1efec1ecaa144a6e77c376a7e66d586e0a003a644e9
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 SEO-themed, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URLs point towards a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://pelibifir.ru/award?keyword=ssc+calendar+2020+20+pdf+download
    • https://cdn-cms.f-static.net/uploads/4448357/normal_60515929df986.pdf
    • https://tokajufifed.weebly.com/uploads/1/3/0/7/130775528/1523470.pdf
    • https://static.s123-cdn-static.com/uploads/4449422/normal_5fc7e64767ca3.pdf
    • https://cdn-cms.f-static.net/uploads/4408475/normal_6053a880d4efc.pdf
    • https://kefileke.weebly.com/uploads/1/3/5/3/135392356/vixusiso_puxufegamujanuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://s3.amazonaws.com/pukiza/36337556209.pdf
    • https://s3.amazonaws.com/kovibu/angular_6_template_driven_form_reset.pdf
    • https://s3.amazonaws.com/xarojapi/51596228111.pdf
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_953de987a7274d51b52b86964b307b3b.pdf?index=true
    • https://s3.amazonaws.com/wukevirenesu/stellaris_ascension_perks_guide_2._0.pdf
    • http://wazinupizut.epizy.com/how_to_change_kidde_smoke_and_carbon_monoxide_alarm_battery.pdf
    • http://fizuvofodiku.epizy.com/wii_rvl_001_manual.pdf
    • https://s3.amazonaws.com/kugelilizibuwum/wadulijatefurisipa.pdf
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_78b471082a71463bac99c174f5c591a7.pdf?index=true
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_006c14b37817438a85976bca1adad713.pdf?index=true
    • https://s3.amazonaws.com/bojafazes/vofen.pdf
    • https://75edee45-cd08-43cb-a752-0c33e5c2343f.filesusr.com/ugd/a7c173_b1046749f6704bd995362788013c9269.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb13.bin
e02dd3c522953ed80240ea0998868a37add3c21571485b0c230c1cfad99ff3ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB13 5276 bytes
font_01_sfnt_off0000fd06.bin
bc21616f736cdc460a56c5ff7a907691239e4458e2448af18de09740778c8ad9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD06 11296 bytes
font_02_sfnt_off000123e4.bin
d780109a96aafaa04b7fb007ed3e89388d73c0565f1f48fbb19038ef4bd330c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123E4 16232 bytes
font_03_sfnt_off00013958.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13958 4324 bytes
font_04_sfnt_off00014758.bin
033cf74d34f55c9e233ee22dfd14416cc54dd3fad732164683eef60346764f8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14758 6068 bytes

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