Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d3fea526d7d76f…

MALICIOUS

PDF

80.3 KB Created: 2022-06-07 02:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: b7be9e0fa62bb82032c1232a967cd1a0 SHA-1: 44c910411bd8f1dec65a25655a72ad779f142a83 SHA-256: 93d3fea526d7d76f850658ff4c881ced678e2a423470dddaefc7b2ed777382d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File T1059.001 PowerShell

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external links, including one pointing to a potentially malicious domain ('podar.co.za'), suggests a lure to download further malicious content or engage in phishing. The heuristic 'PDF_SEO_LINK_FARM' indicates a technique to generate traffic or distribute malware through a large number of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://podar.co.za/YmrXLWy8?keyword=usmc%20scout%20sniper%20manual%20download%20%20free
    • https://lifovidas.weebly.com/uploads/1/3/1/8/131856672/revobu_jawegubekezu_tiretiramom.pdf
    • https://kapilike.weebly.com/uploads/1/3/4/6/134686456/5907385.pdf
    • https://duwesokele.weebly.com/uploads/1/3/1/6/131606866/degodijogifir_tamemuxupugulu.pdf
    • https://fifitusaperofij.weebly.com/uploads/1/3/4/6/134605769/puwove-rametuzowufago-gipetu.pdf
    • https://foxikojowi.weebly.com/uploads/1/3/1/3/131398405/c0b27.pdf
    • https://seforurusux.weebly.com/uploads/1/3/4/1/134131879/jijemenamubaxas.pdf
    • http://dogomanhnghia.com/uploads/files/sadejaroxulozomikujexa.pdf
    • https://nppgursaraijhansi.in/ckfinder/userfiles/files/55552100594.pdf
    • https://xajaxosu.weebly.com/uploads/1/3/5/3/135304217/751286.pdf
    • https://fofapabijutoza.weebly.com/uploads/1/3/4/7/134713913/660561.pdf
    • https://tiwotutekog.weebly.com/uploads/1/3/4/7/134722077/rivususunovame-vurit.pdf
    • https://tutetalugono.weebly.com/uploads/1/3/1/8/131857120/kutijeji.pdf
    • https://xafokevixutevib.weebly.com/uploads/1/3/2/6/132681308/4186269.pdf
    • https://pejusokipa.weebly.com/uploads/1/3/4/9/134902294/kamilu-nivofewokegi.pdf
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/64702140349.pdf
    • http://studioiulianella.it/userfiles/files/vezasek.pdf
    • http://rediger.stoholmvand.dk/upload/files/54709422004.pdf
    • https://suxedakufad.weebly.com/uploads/1/4/1/5/141588321/xevonupo_vuzotum_zisesaxunirad_kobisuxoj.pdf
    • https://alcoquimicos.com/ckfinder/userfiles/files/43685264290.pdf
    • http://otworz-biuro-podrozy.pl/userfiles/file/zofexujorodut.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce5a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5A 16792 bytes
font_01_sfnt_off0000e66c.bin
ce5a0244012f16525120e17f525382cc2f62c7b1c79fab701ccff280eb809620
pdf-font-stream PDF embedded font (sfnt) at offset 0xE66C 18940 bytes
font_02_sfnt_off000117e9.bin
b71cdfdc0a33ba77bea6a5c37dbc9d72ff76abf9d5e4a8602eeb5b830be28d87
pdf-font-stream PDF embedded font (sfnt) at offset 0x117E9 10972 bytes