Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ddcf8819f6e058b…

MALICIOUS

PDF

93.8 KB Created: 2021-01-26 10:47:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2358a2f8e2399ffd45acbeb475d2c87e SHA-1: 9910b4919c17661cc548c6b8a98919bd67c75f27 SHA-256: 9ddcf8819f6e058b6073a5f078aef92c207955db575a72882aa47922cec827f6
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a large number of external PDF links, coupled with a 'download' lure, suggests a phishing or content-farming attack. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious workflow, likely involving the download of further malicious content or redirection to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffnew.ru/aws?utm_term=aghorastra+mantra+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484365/normal_5ffe8630068d1.pdfIn PDF document text
    • https://dujibirarikow.weebly.com/uploads/1/3/4/3/134321406/mekuvupigogoxaj-jomisejowade-bimajesi-xunemupukivire.pdfIn PDF document text
    • https://sabiwivilo.weebly.com/uploads/1/3/4/3/134316676/sakesupepu-jinog.pdfIn PDF document text
    • https://cdn.sqhk.co/javomekoru/ezimhh6/wufowozidunusu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421477/normal_60027d4b4f8c7.pdfIn PDF document text
    • https://tafedelimege.weebly.com/uploads/1/3/5/3/135345870/zupadowopagewude.pdfIn PDF document text
    • https://cdn.sqhk.co/musezikuzapi/hh1hjha/zipojategudetipaputa.pdfIn PDF document text
    • https://cdn.sqhk.co/bosavoked/gdtqhf7/vmware_horizon_client_download_5._4._2.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/iieIdoQ/crazy_taxi_3_high_roller_steam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452217/normal_5fca0b0eb7998.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378619/normal_5fe2132bae5f4.pdfIn PDF document text
    • https://sazavilekin.weebly.com/uploads/1/3/4/8/134851962/padez_dekawukaweboge_lexor_jewetulisudeg.pdfIn PDF document text
    • https://poxatekegevu.weebly.com/uploads/1/3/4/7/134753674/jupapetogakamu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • http://fedorahosted.org/lohitIn 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77D 5412 bytes
SHA-256: 9cd4c4353e9088187a292f7ee5ddc5308884463fa5b030867644a99e3a158c35
font_01_sfnt_off0000f9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BD 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off00010525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10525 9796 bytes
SHA-256: bbdcba8178e78f4a02b11a4a4753cb10ede4df9b31cc3763dd89eb3e8594fd1a
font_03_sfnt_off000118b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B2 16112 bytes
SHA-256: 067695ec35e22d3f2573ffaad0aa185f8394226408f7c689e514996743215f9b
font_04_sfnt_off00014af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AF1 8812 bytes
SHA-256: ab01ce52925c57ca6cdde6aeb2600e58be5ff0501d8bc2ba1fa9e59c2b22b301

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