Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e2bc6c716f58fd…

MALICIOUS

PDF

71.8 KB Created: 2021-01-05 04:58:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 21b91f4df04379e9e0f077ff1935e8c5 SHA-1: ddd4844777f4f2a34dd6e32107dbdccd3e868186 SHA-256: 53e2bc6c716f58fd6dfe92471a401ec9284eef45f06d58044c50d590292ce8ca
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a redirector link and a link farm. The embedded URLs suggest an attempt to direct users to malicious or phishing sites. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/aws?utm_term=benevolent+assimilation+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4368227/normal_5ff37e58e707b.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/sevuxetelazu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384316/normal_5f92bfea0f6b1.pdfIn PDF document text
    • https://zorisurirumu.weebly.com/uploads/1/3/4/6/134600588/1356716.pdfIn PDF document text
    • https://sajenaviwabawi.weebly.com/uploads/1/3/4/2/134266368/5276895.pdfIn PDF document text
    • https://vumifedesonuzik.weebly.com/uploads/1/3/4/8/134849268/xesuru.pdfIn PDF document text
    • https://lopuxewununoj.weebly.com/uploads/1/3/4/7/134748711/zomukix_warage_lujor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487888/normal_5fccc37c8d660.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/zikeg-dezurol-ritusife.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420903/normal_5fdf888dbd17b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383798/normal_5f928de8e6b3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366666/normal_5fc76f5824a4b.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/bogeguva/acr_call_recorder_pro_apk_cracked.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/android_tv_app_launcher_builder.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/gulavaxedakezo.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/beaufort_school_gloucester_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/jenunukamomulu.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_off0000dcfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFE 5200 bytes
SHA-256: b6652d810ff3993901d1dfb6fc0c61e041c05b6abae475c78ea1fd92adb5fcf0
font_01_sfnt_off0000eead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAD 10596 bytes
SHA-256: 8674d0896e7bf5d4f45662ef59e69ce20c49f1518e212261f601129e6896a1ec

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