Malicious PDF — malware analysis report

Static analysis result for SHA-256 fccd3a13eff540ff…

MALICIOUS

PDF

96.1 KB Created: 2021-01-19 01:21:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 79f2ac6428e3a9595f77e1a68019dcc2 SHA-1: d7fb9c2c94e8b985148fad129c7d2f2679d87939 SHA-256: fccd3a13eff540ff522118f20562fc4bd938ce85149284eff2db1986a7f03b80
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external websites, including a known malicious redirector. The document's structure and content suggest it is part of a link farm designed to direct users to potentially malicious sites, possibly for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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.
  • 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://yafferge.ru/123?utm_term=maru+japanese+restaurant In PDF document text
    • https://dikivofugejal.weebly.com/uploads/1/3/1/4/131453076/137be87fcaece15.pdfIn PDF document text
    • https://kunudixi.weebly.com/uploads/1/3/4/6/134667289/xesovaj.pdfIn PDF document text
    • https://viwosexoteb.weebly.com/uploads/1/3/4/6/134631328/4236670.pdfIn PDF document text
    • https://site-1177257.mozfiles.com/files/1177257/yu_gi_oh_duel_links_hack_ios_download.pdfIn PDF document text
    • http://kabosimoligobe.iblogger.org/67922370100.pdfIn PDF document text
    • https://lepovomika.weebly.com/uploads/1/3/4/7/134701686/6856226.pdfIn PDF document text
    • https://juvikawupuw.weebly.com/uploads/1/3/1/4/131409017/5790908.pdfIn PDF document text
    • https://site-1178251.mozfiles.com/files/1178251/taxax.pdfIn PDF document text
    • https://befufagu.weebly.com/uploads/1/3/1/3/131384284/f6fc372.pdfIn PDF document text
    • https://site-1166042.mozfiles.com/files/1166042/sweet_empire_mod_apk_unlimited.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/veliga.pdfIn PDF document text
    • https://site-1173361.mozfiles.com/files/1173361/green_top_guidelines_gestational_diabetes.pdfIn PDF document text
    • https://juzatimeb.weebly.com/uploads/1/3/4/6/134605854/46da8b78ac941e.pdfIn PDF document text
    • https://belaputeze.weebly.com/uploads/1/3/4/5/134515271/c401bc.pdfIn PDF document text
    • https://site-1167993.mozfiles.com/files/1167993/the_floor_is_lava_contestant_sign_up.pdfIn PDF document text
    • https://vedakevuvapi.weebly.com/uploads/1/3/4/0/134013486/xixokofimagulis.pdfIn PDF document text
    • https://rujapunilibufig.weebly.com/uploads/1/3/4/7/134713438/67ac98aa676fcf.pdfIn PDF document text
    • https://rotaxavevun.weebly.com/uploads/1/3/4/8/134884867/gisetedatokepa-nogolefef-pafav-jaxoxotid.pdfIn PDF document text
    • https://site-1172834.mozfiles.com/files/1172834/nasa_moon_rocket_launch_video.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xegefonupekowa.epizy.com/mofewuge.pdfIn PDF document text
    • http://voxosejak.rf.gd/adb_shell_pm_clear_com._android._settings.pdfIn PDF document text
    • http://jetetekeputesi.epizy.com/solevufegopewe.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 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E9 8180 bytes
SHA-256: 3c26ce5a6af7bb22ba1509b72a0ea3c5aef31dacc61b14e016f334c227ac9547
font_01_sfnt_off000101bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BF 4860 bytes
SHA-256: 9cb7b588f44a3f6e46b71d9f83d30deeae9ac7acb0b74fe7cd40f2e895412509
font_02_sfnt_off0001125b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125B 2172 bytes
SHA-256: 9738ceee40076f8646ac9230d8d0306d5021bd70633abedf95ee04e2eafce790
font_03_sfnt_off00011bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB6 4360 bytes
SHA-256: e7a5a22e7e30374b01b635e1dd1b8c555f54ded5aecbb5c8cc19d137692ae49f
font_04_sfnt_off00012c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1A 11848 bytes
SHA-256: 70c45fc937cc543f48c12ff9f8653a4fc49b912b63b5f0c91d9cd2359f72fd9e
font_05_sfnt_off000153a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153A0 16548 bytes
SHA-256: e752d967e564416d5da04d782a1e17d96f46248d73579976c632c3583187e4ed
font_06_sfnt_off00016a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A03 1736 bytes
SHA-256: 551918360585b1590efa6fd2a215345b2f702067d151a0e4b48cfa7490b57960

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