Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2eb4e16125bb5a5…

MALICIOUS

PDF

73.6 KB Created: 2021-01-17 12:02:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 9c1205a4dfd2c31845d8c9ca2a7498a2 SHA-1: 101ecd168a764245451c09047830e38984e6d4c5 SHA-256: d2eb4e16125bb5a55092aea32c31218391bbcdc0f41ee0d0cdad3cee6ec512a0
126 Risk Score

Malware Insights

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

The file is a PDF document that contains numerous embedded URLs, many of which point to disposable hosting services and are likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'Nibs college application form pdf', aligning with the PDF_SEO_DISPOSABLE_LINK_FARM heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/aws?utm_term=nibs+college+application+form+pdf PDF link annotation
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/2493390.pdfIn PDF document text
    • https://ravekenelar.weebly.com/uploads/1/3/4/0/134041687/3457174.pdfIn PDF document text
    • https://jowodetuleguzu.weebly.com/uploads/1/3/1/8/131856173/fc5a1df799e.pdfIn PDF document text
    • https://site-1189736.mozfiles.com/files/1189736/disney_plus_subscription_support.pdfIn PDF document text
    • http://boxidodo.22web.org/99061200056.pdfIn PDF document text
    • https://cdn.sqhk.co/lezebulodiw/hhbjfgj/54818005694.pdfIn PDF document text
    • https://site-1168287.mozfiles.com/files/1168287/atif_aslam_songs_old_mashup.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/c5nhijj/37149920986.pdfIn PDF document text
    • https://niridugur.weebly.com/uploads/1/3/5/2/135296669/5fac3.pdfIn PDF document text
    • https://cdn.sqhk.co/kinifukix/aVgcd1o/78497368957.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/qijgc1v/79121271144.pdfIn PDF document text
    • http://dunizajo.66ghz.com/nupevebibukumabusuzagos.pdfIn PDF document text
    • http://fomilexavekol.22web.org/pitinatulila.pdfIn PDF document text
    • https://site-1177275.mozfiles.com/files/1177275/724_angel_number_twin_flame.pdfIn PDF document text
    • https://cdn.sqhk.co/vavusiwi/Njbjggx/alien_shooter_2_reloaded_apk_hack.pdfIn PDF document text
    • http://juvasojiwal.66ghz.com/report_gas_leak_south_wales.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/wakuzidi/boxtops_for_education_printable_sheets.pdfIn PDF document text
    • http://favekagopu.epizy.com/l_alcoolisme_chez_les_jeunes.pdfIn PDF document text
    • http://waruzav.epizy.com/fishing_report_folly_beach_pier_sc.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/android_tv_box_m8s_pro_l.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/fatovefusesame.pdfIn PDF document text
    • http://depebovibu.epizy.com/airlift_movie_full_hd.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_off0000e2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EB 5584 bytes
SHA-256: 0b83df7df792eafc859f9e7947622c0ecc7ba15725349845891147d0764f2461
font_01_sfnt_off0000f5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D4 10176 bytes
SHA-256: da0d472288e9d9376bbf02b5910cd4cc25de75882006fe5bc1e053b502467da8

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