Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f1ba0faac1f6593…

MALICIOUS

PDF

75.1 KB Created: 2021-03-15 11:10:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f681a3ee7c71bb670060f77520273e09 SHA-1: d0ebf279fdcce9d8ca1ea8d743e9e2f6a80fc004 SHA-256: 7f1ba0faac1f6593ea900156b11d88532143f5bd82fa6bf77650426b4b75b73f
96 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though partially corrupted, suggests a lure related to 'Cosco child car seat instructions' to entice users to click on the malicious links. No scripts were extracted, but the presence of external URIs indicates an attempt to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=cosco+child+car+seat+instructions PDF link annotation
    • http://kowesawu.iblogger.org/90900492647.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405953/normal_5fe0d632c8f04.pdfIn PDF document text
    • http://myfavoritesun.xyz/12981835682fhdl4.pdfIn PDF document text
    • http://istlan.fun/distributed_algorithms_nancy_lynch_free_downloadnylby.pdfIn PDF document text
    • http://itali-big.space/541152095890yqio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448724/normal_5fd7af39633ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402478/normal_5fcc3d998ffce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412767/normal_601bbc914b7ce.pdfIn PDF document text
    • http://filanion.online/what_is_t1-11_siding_made_ofowrdy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372967/normal_5ff66ab56e6d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ramapenutizawa.epizy.com/adhyatmika_vishayalu_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60c72c2e-cedd-4ec2-9479-dc365acfc094/xanathars_guide_to_everything_racial_feats.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/tea_tv_mod_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/kefusawewe.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/us_news_world_report_statistics_rankings.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/gamefowl_breeding_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/how_much_do_supply_chain_majors_make.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/82416342688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1e60e18-5f4f-42b2-a343-a9478bcb529c/fezelujuvirosejafefo.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/wevusaroserogafipupozipex.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/kitezavawizesit.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/dead_cells_apk_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/058a549b-a6f0-4c64-81b3-7727152ea245/30240001208.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_off0000ea5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5E 4932 bytes
SHA-256: 9a1e8423944282e9412ba6d7ad8ed6e90bbf11c2b42273089424247931243fc4
font_01_sfnt_off0000fb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB14 10572 bytes
SHA-256: f8b1a2d29900afe214c2004af7698b447cab2b14287253214c5667d4dc5b0cf0

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