Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56e375a9fb5368c…

MALICIOUS

PDF

84.0 KB Created: 2021-05-14 22:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2576ed518bd91b3066cbfe2bb896e4ff SHA-1: 1181975a8487e8f9d02a6e47fed7bfd004f56506 SHA-256: e56e375a9fb5368cc37cd16e5b542db9c961f7f86d5b19f4d3bde36cd2c1a8e4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/strik?utm_term=dyson+slim+ball+animal+upright+vacuum+cleaner+reviews PDF link annotation
    • http://anyita.space/10485082273udp4j.pdfIn PDF document text
    • http://uggi-ugg.com/mere_bhole_bhandari_song_mr_jattd8xzo.pdfIn PDF document text
    • http://0fruit.space/xirimeforiwakukitidowzesj.pdfIn PDF document text
    • http://takipleskazan.org/39477500212pynwo.pdfIn PDF document text
    • http://requiredjokblog.com/arya_2_mp3_songs_download59908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388060/normal_604fb8fa619f2.pdfIn PDF document text
    • http://fringigejy.site/7104744004k0xz0.pdfIn PDF document text
    • http://xugerovogubex.22web.org/5134411704.pdfIn PDF document text
    • http://fibokuluzizuse.iblogger.org/fifth_grade_science_worksheets.pdfIn PDF document text
    • http://samyog.ru/kebejolugtrpbo.pdfIn PDF document text
    • http://usacreditcheck.info/20406230468qugdi.pdfIn PDF document text
    • http://telgrm.site/wutuzaguwolorij6j18f.pdfIn PDF document text
    • http://getcreditcheck.info/how_to_change_omron_mc_246_thermometer_from_celsius_to_fahrenheitmio2s.pdfIn PDF document text
    • http://getyourcredit.info/1578428537muk59.pdfIn PDF document text
    • http://harmony-market.ru/anthem_for_doomed_youth_poetry_analysiscll2v.pdfIn PDF document text
    • http://prostochillforum.fun/pro-sumer_power_ii_audiobookiqdz0.pdfIn PDF document text
    • http://maturibcgj.space/total_quality_management_in_education_book75muz.pdfIn PDF document text
    • http://lotofotu.iblogger.org/introduction_to_multimedia_arts_syllabus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418566/normal_602fd5380ab8a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xovapigebiz.rf.gd/action_plan_for_sales_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4C 5624 bytes
SHA-256: 5319726916619ca397ceff1d93a7747f3f08baa4e010da5e63ba20796e8b55d0
font_01_sfnt_off00010d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D51 11532 bytes
SHA-256: bf47e7d42773b42cc8c957d5a6b069ef30fb4c1d494a462f1ac2943e1a545025
font_02_sfnt_off0001344f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1344F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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