Malicious PDF — malware analysis report

Static analysis result for SHA-256 197c87dc94be1532…

MALICIOUS

PDF

77.7 KB Created: 2021-02-23 03:42:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ea5a259cc50b202b5a98ed9b428420c2 SHA-1: ddce3d73603062151fcee7458d29343229d8e79a SHA-256: 197c87dc94be15324d6dd8f5b8004866ce5b7dc656142daa0b6eecf3541bb284
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, identified by heuristics as a redirector for phishing or malware. The document body, though heavily obfuscated, contains text related to 'heat loss in buildings', suggesting a lure to entice users to click the malicious link. No scripts were extracted, but the presence of malicious redirector links strongly indicates a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://crophysi.ru/strik?utm_term=what+is+heat+loss+in+buildings In PDF document text
    • http://zekajatinaz.iblogger.org/sworn_affidavit_form.pdfIn PDF document text
    • https://cdn.sqhk.co/damapegapi/J45jdgd/30_day_challenge_at_home_workout.pdfIn PDF document text
    • https://cdn.sqhk.co/lebuxexofe/i52Eher/dangal_serial_time_table.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/hc80JEU/sofexeg.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/21hduhh/68618416483.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405895/normal_600524c3d70cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422368/normal_60069d7c5beed.pdfIn PDF document text
    • https://cdn.sqhk.co/jonuwezipagi/cjdpgd6/starlink_release_date_canada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496360/normal_5fcf8919808f9.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwojeta/WhbUjbu/toraduwuvufedemisejazoxan.pdfIn PDF document text
    • https://cdn.sqhk.co/mekekomubun/fjer7ha/hello_kitty_nail_salon_game_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465402/normal_6015c49c667f0.pdfIn PDF document text
    • https://cdn.sqhk.co/fomiroza/eggQAjc/monster_world_fire_gba_rom.pdfIn PDF document text
    • https://cdn.sqhk.co/dizoketa/ifjchhR/toy_super_smash_bros_apk_uptodown.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/wemazun/38233702806.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/kabudiredejotawi.pdfIn PDF document text
    • http://badiwiv.epizy.com/womut.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/90887220823.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/ipad_air_2_cellular_ipsw.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/metformin_500mg_bd.pdfIn PDF document text
    • http://nujexaraxeb.epizy.com/amapiano_music_videos_mp4.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D4 5144 bytes
SHA-256: bfe26377e4faef867da49caf34bb96f0a584d0bd946aff100411f47239e25dac
font_01_sfnt_off0001035b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035B 11072 bytes
SHA-256: 2e99b9c4ba160b45825341c77e117bac85add2d0a63e11bda764b9a1210a7b01

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