Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ff7541d133e896…

MALICIOUS

PDF

66.7 KB Created: 2021-02-14 03:28:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: dd57f8c06a9e7d11167e1d49add6901f SHA-1: da34404f5f39f955e5026d3c6d6bfc52ca145f82 SHA-256: 95ff7541d133e896ff422e57b1962e4b85e82fed53dad4251559ec21d430c9ed
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, many hosted on disposable domains like weebly.com. The document body, though heavily obfuscated, contains references to 'Paginas de animes online', suggesting a lure to attract users interested in such content. The presence of many external links points towards potential phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://bologen.ru/123?utm_term=paginas+de+animes+online PDF link annotation
    • https://jawufilarom.weebly.com/uploads/1/3/6/0/136054640/makajekesab.pdfIn PDF document text
    • https://dujekiwirole.weebly.com/uploads/1/3/4/2/134266498/814d01880d8.pdfIn PDF document text
    • https://regofixaf.weebly.com/uploads/1/3/5/3/135318676/buvadosurele.pdfIn PDF document text
    • https://xuvuvigaxopezut.weebly.com/uploads/1/3/4/7/134721928/3925317.pdfIn PDF document text
    • https://nutiniwe.weebly.com/uploads/1/3/4/8/134870290/tadifuvugi_tawefegoguzo_rejawuzewu_divijujaseg.pdfIn PDF document text
    • https://velonifiwivuli.weebly.com/uploads/1/3/0/7/130739758/6934f63619ac9e4.pdfIn PDF document text
    • https://zetapowopes.weebly.com/uploads/1/3/0/8/130813904/101c81ca0747e2.pdfIn PDF document text
    • http://galubiwigo.iblogger.org/vimuwogodajedumewerasab.pdfIn PDF document text
    • https://dugepawegozil.weebly.com/uploads/1/3/1/6/131606694/wixovo.pdfIn PDF document text
    • https://davabodijesofid.weebly.com/uploads/1/3/4/4/134474123/fonefu_dubin_filamide_jafanemerasox.pdfIn PDF document text
    • http://rotixumuzu.22web.org/havoc_brothers_album_songs.pdfIn PDF document text
    • http://bafujowop.22web.org/hallucinations_dvsn_song.pdfIn PDF document text
    • http://gefaveje.22web.org/duke_energy_power_outage_report_number.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pidezesu.rf.gd/kegelimujewipudugefop.pdfIn PDF document text
    • http://pelatid.epizy.com/present_perfect_continuous_tense_exercise.pdfIn PDF document text
    • http://vovugezufined.epizy.com/xonupadelewilavokanib.pdfIn PDF document text
    • http://gaxosinuda.rf.gd/nikezirazulomefolap.pdfIn PDF document text
    • http://nubuwij.epizy.com/wonigutapoxogiwixepun.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_off0000c95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95F 5052 bytes
SHA-256: 394a1024201ae561ebb68df2f2101077979a9920ef4a960fb5e179908454f60f
font_01_sfnt_off0000da7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7F 10488 bytes
SHA-256: 95c74ce613038f96faa7a345bb1a1c9467df618c6df3b3dc0a20106ced80aa1b

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