Malicious PDF — malware analysis report

Static analysis result for SHA-256 8466c9df08a78c5a…

MALICIOUS

PDF

74.8 KB Created: 2021-03-15 11:26:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0a65c3c0f9c5e4d5a0a39a501857ad97 SHA-1: d1caf72bd5a7aecafc20fef96069e40c4c1b2a94 SHA-256: 8466c9df08a78c5ae336e6ed1fbfc4cc49c5a17bb3cf0668c5101dcf402ac821
136 Risk Score

Malware Insights

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

The PDF document was flagged by multiple high-confidence heuristics, including ML and ClamAV, as malicious and a phishing attempt. The presence of an SEO redirector URL suggests a lure for free downloads. Although no scripts were extracted, the PDF structure and external URI firings indicate a malicious intent to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • 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://jumiwimov.ru/strik?utm_term=how+to+use+the+solve+function+on+ti-84+plus+ce PDF link annotation
    • https://cdn.sqhk.co/xiladuxe/OMhgZ9n/precise_v7_premium_rolling_ball_pen.pdfIn PDF document text
    • https://cdn.sqhk.co/bipozipo/J5WheCR/find_the_differences_a_cat_house_apk.pdfIn PDF document text
    • http://budujene.iblogger.org/opencv_tutorial_c.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/brjdZhh/police_chase_thief_pursuit_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/jfiijcl/18435976513.pdfIn PDF document text
    • https://cdn.sqhk.co/dunokufimove/ptXicXX/ratoronojanefogojine.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/hD1aeM1/jirodunutubatu.pdfIn PDF document text
    • https://cdn.sqhk.co/bevizewo/jc7ihBo/masterminds_netflix_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/zugivakizo/jgfvjhu/fitbit_inspire_2_launch_date.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/IhdIie5/72563710114.pdfIn PDF document text
    • https://cdn.sqhk.co/gubogezemazo/ryijWFq/lost_temple_of_the_inca_disney.pdfIn PDF document text
    • https://cdn.sqhk.co/wefekoferu/Nxgjjc5/basket_wall_decor_target.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/mghVIje/policy_briefing_paper_example.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/gsBXhhN/heroes_and_puzzles_training_camp.pdfIn PDF document text
    • https://cdn.sqhk.co/gufuluzibos/jdhegfW/penitim.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/wonumafubij/hipster_wedding_card_template.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/wow_elemental_shaman_pve_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/rawelojaxatokolike.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/35430042325.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/vumopowuzizaxozur.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/40913161196.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/aromaticity_in_non_benzenoid_compounds.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/1739983704.pdfIn PDF document text
    • http://duxurulokij.epizy.com/how_to_use_a_spa_bathtub.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/happier_piano_sheet_music_easy_with_letters.pdfIn PDF document text
    • http://kixulal.rf.gd/cancer_gastrico_2016.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_off0000e34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34E 5224 bytes
SHA-256: 7ebfcf49ff12ed88f491e065d96a28e0e7aafd1fa58cb717090d60458ca5fdd0
font_01_sfnt_off0000f546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF546 11584 bytes
SHA-256: 26e33fc3bd5628415df2a7e9a9827ae4542aeed4b1a3f62b9207d1782b43c4bb

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