Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca12096e824c0df3…

MALICIOUS

PDF

83.6 KB Created: 2021-02-28 21:30:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7dd623c8d9d6d98bb28581cdd41d63b5 SHA-1: c92e68f949d74d679de998ca8a91e14df91b69e3 SHA-256: ca12096e824c0df319cb152b94016bf7ce02a4b4c55a66f5464e8a8470c88e6d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, with one example being https://cdn.sqhk.co/xenudipu/mboyhgx/38908405678.pdf. The document body contains text related to movie ratings and application names, suggesting a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/123?utm_term=the+boy+who+harnessed+the+wind+movie+rating PDF link annotation
    • https://cdn.sqhk.co/xenudipu/mboyhgx/38908405678.pdfIn PDF document text
    • https://cdn.sqhk.co/govazofaj/gf4Uhhf/simon_the_sorcerer_3d_review.pdfIn PDF document text
    • https://cdn.sqhk.co/deguwuvale/ihQijzt/super_fast_browser_apk_download.pdfIn PDF document text
    • http://balegetiwep.mywebcommunity.org/jisubosetokokukizolojakit.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/juHkyji/8113274043.pdfIn PDF document text
    • https://lomimasexoguxi.weebly.com/uploads/1/3/4/7/134736135/4125330.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuwagopole/aDkwhfk/63303286670.pdfIn PDF document text
    • http://astropsychology.website/33636373343s8erf.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/aijgfsK/christmas_coloring_books_near_me.pdfIn PDF document text
    • https://xawavefite.weebly.com/uploads/1/3/4/6/134667803/zimowiwowelatez_xupojufimiju.pdfIn PDF document text
    • https://cdn.sqhk.co/dofewijoras/4hcPijG/rebuilding_paradise_documentary.pdfIn PDF document text
    • https://gisoroweri.weebly.com/uploads/1/3/4/8/134893792/76959811eab4cd.pdfIn PDF document text
    • https://cdn.sqhk.co/wawabosamugo/iZ2XJNQ/knife_throwing_game_roblox.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/93853045965.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/dXjePRv/komefepimijuwa.pdfIn PDF document text
    • https://cdn.sqhk.co/lipidupi/2daUVhd/tumblr_girl_dress.pdfIn PDF document text
    • https://cdn.sqhk.co/suwajipox/JiiG3ia/schema_electrique_moteur_monophase_220v.pdfIn PDF document text
    • https://cdn.sqhk.co/nonagidux/tqAgjje/42430565695.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B7 5548 bytes
SHA-256: ed6d93472ccd28fdbe3116bb5fd708215a8dd32bd833ddd63b825b72ffeadb5b
font_01_sfnt_off00010a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A83 11648 bytes
SHA-256: 8d3324534d32cb25de0165b65b1488a3b2733d4361ac2268326410efc646cd4a
font_02_sfnt_off000131e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E5 6084 bytes
SHA-256: 0bbd385887db5074fbd87256d70f98a882c9353f1362fd6c1377f0ce146e0394

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