Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc08a9445cbca4ab…

MALICIOUS

PDF

81.1 KB Created: 2021-03-20 01:01:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7607104bcd2d8a81e7cb9da853a74e1b SHA-1: 512118ae7f15a1518b2b18ae3588a1bfb29f6484 SHA-256: dc08a9445cbca4ab6afb873659efe453ac90f7d0e48c04f94e30f41fb383889e
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The file contains numerous external links, many pointing to PDF files hosted on various domains, suggesting a link farm designed to distribute malware or phish users. ClamAV also detected it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://zajinet.ru/123?utm_term=angry+mood+whatsapp+status+free
    • https://sarowamirubene.weebly.com/uploads/1/3/4/7/134736793/vibudikabamuv.pdf
    • http://kopuvimu.scienceontheweb.net/49105731576.pdf
    • http://xajavawinereko.mywebcommunity.org/xajasag.pdf
    • http://tiluvopira.medianewsonline.com/call_of_duty_modern_warfare_maps.pdf
    • https://viwoxinuzozaxa.weebly.com/uploads/1/3/1/6/131636825/3696646.pdf
    • http://mikovil.mywebcommunity.org/3350883112.pdf
    • https://bilujadaju.weebly.com/uploads/1/3/4/7/134772480/jukimokoweb.pdf
    • https://ponatuxo.weebly.com/uploads/1/3/4/5/134596183/nululifikuvewij.pdf
    • http://janurikemodowu.iblogger.org/competing_interests_scientific_reports.pdf
    • http://xuxuxib.iblogger.org/lagu_bunga_bunga_cinta_dude_harlino.pdf
    • http://toguvuveleguna.22web.org/ks3_indices_worksheet.pdf
    • https://nozirurabi.weebly.com/uploads/1/3/0/7/130738896/poravipozemuteniti.pdf
    • https://kevavabine.weebly.com/uploads/1/3/1/4/131406582/cfd96.pdf
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/gabeso.pdf
    • http://ravitidi.22web.org/vorikuxawakizujenajul.pdf
    • http://sovuxofi.66ghz.com/dupotedesotixovuxubufutu.pdf
    • https://kuxozofaxaxasij.weebly.com/uploads/1/3/5/3/135325708/sibifebarujero.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jajijewanetu.epizy.com/wosazazebivugowixidagodo.pdf
    • http://surewefuwiba.rf.gd/93141679530.pdf
    • http://wapinogure.epizy.com/goat_simulator_trophies_waste_of_space.pdf
    • http://zizakipu.epizy.com/32571925168.pdf
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_374f3117f61f4668a3e7af076cc54a1f.pdf?index=true
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_a7bbbd9deb974df6a7dce909729842ee.pdf?index=true
    • http://jarepumemaxi.onlinewebshop.net/26688685928.pdf
    • http://mepefixo.epizy.com/learning_korean_alphabet.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddd0.bin
d0c19ada6204fe6172a73da8aa40aa151743ad82cfa158b929e0b0554e831e2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD0 5604 bytes
font_01_sfnt_off0000f0c9.bin
fa98316bad0ee393e4244be63b1d230beb4724cf855be96ad4f2c87a5b302ae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C9 2140 bytes
font_02_sfnt_off0000faa3.bin
0484b93092677f9d34d70db62edc0af1dc183b6edc43693170cf1363a109c4b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA3 10664 bytes
font_03_sfnt_off00011f2e.bin
1ca254b805b0e84bf3a8ef445121dfd44758f76a97e8cd5bc823658e21b642b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2E 16704 bytes

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