Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c6c5e40dfb5e8db…

MALICIOUS

PDF

99.9 KB Created: 2020-11-26 10:27:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1e58cd11c52704b4f494e4327bd98dbb SHA-1: dcafe23615c97d07bd37a319bbd947055da9df19 SHA-256: 8c6c5e40dfb5e8dba6a85737a9e62dd0cfa0493e1180121cba448bdeacfe05ec
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafffe.ru/123?utm_term=v+for+vendetta+comic+pdf+download PDF link annotation
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/tunitulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444884/normal_5fa0dbd0011ee.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/18ad995.pdfIn PDF document text
    • https://fekujerixotose.weebly.com/uploads/1/3/4/8/134896765/radetizix-xarafoz-nuxusijizojuv.pdfIn PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/aaa1b366bd7fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381098/normal_5f8dc3e2280f5.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/risisipajole/turnip_recipes_simple.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/zilew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a208628c-fe72-4bb2-a99f-ee5b34d33251/kulosomegagolekozusega.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/chemistry_major_usf.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/warhammer_40k_codex_8th.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/paris_metro_map_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25c4aa6a-a08a-47de-9362-8036817f1264/jenubiwinelaziluwufomogin.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/ezreal_guide_mid_s8.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/define_pragmatics.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/8667774671.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C01 5240 bytes
SHA-256: 707c0fdf4c36be4e113f43cf36ac89f5ee21ae191b9e8eeb4567a19b1339fe12
font_01_sfnt_off00013ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDB 11468 bytes
SHA-256: f76e6162575aac0cefee66f13804082b2dbdcf478cfce70a941176e4694933b1
font_02_sfnt_off000164ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164ED 18544 bytes
SHA-256: a6203909d182a7513703eec2182afd9f6329a35eb3d001c3614d302a636c2e18

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