Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec2e0f35dbd4d45…

MALICIOUS

PDF

72.5 KB Created: 2021-01-10 16:46:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8635d1f9088a6ca0f55e9c1929125d0f SHA-1: 98101253ea38551531c05b67e0fc4a859f810bc6 SHA-256: fec2e0f35dbd4d4502c888be0c8e07668ba6c348966c9ac40f86d2c3d367eaf9
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a malicious redirector and another part of a large link farm. The document body, though heavily obfuscated, suggests a lure related to legal correspondence. The presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=formal+letter+format+to+attorney In PDF document text
    • https://cdn.sqhk.co/nebuwaxisiw/shdgfic/forest_survival_games_online.pdfIn PDF document text
    • https://fofavaduk.weebly.com/uploads/1/3/4/4/134436242/2245645.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/idiceih/download_old_phone_ringtones_for_android.pdfIn PDF document text
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/nezake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384655/normal_5fadde328fe86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391015/normal_5fa327050bb5a.pdfIn PDF document text
    • https://wawurekufa.weebly.com/uploads/1/3/4/3/134322490/sejosukexa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/full_hd_indian_flag_background.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/sheex_coolest_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/10605043912.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/46325019562.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/1358268939.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/dikaxesobitirasizamolovej.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE181 4792 bytes
SHA-256: 5a1ba01b531005a8e979c5b2d2deebb55b81a9d77f3dcd3c1ad890ef9f71304d
font_01_sfnt_off0000f1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BF 10512 bytes
SHA-256: 6a141a2adb35f6c816cbd8eca943a30fa555251a77680ddeba237601673ed779

Open this report in the interactive analyzer, or submit your own file for analysis.