Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c411f8ae1ab61f…

MALICIOUS

PDF

82.8 KB Created: 2021-03-02 05:41:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc34768eecc08119e1d9fc0d4718cb10 SHA-1: e479b31adfb148d2912d8d1fef24717353183d03 SHA-256: 17c411f8ae1ab61f09c49bf083dc58ad733ea45f42704fdc8605b99d264716e6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a large PDF link farm. The document body, though heavily obfuscated, appears to reference printer ink cartridge issues, suggesting a lure to trick users into visiting malicious sites. The presence of multiple PDF_URI and PDF_SEO_LINK_FARM heuristics strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/123?utm_term=hp+envy+4500+ink+cartridge+problem
    • https://revowerixes.weebly.com/uploads/1/3/1/6/131607662/podew.pdf
    • https://cdn.sqhk.co/sifolilo/chgKnLl/34000641088.pdf
    • https://cdn.sqhk.co/geroterunetu/bbptjhH/battle_islands_ps4_review.pdf
    • https://gixakipero.weebly.com/uploads/1/3/1/4/131412713/9354305.pdf
    • http://milixowegamu.22web.org/90189519675.pdf
    • http://bonus332.site/the_power_of_broke_free_downloadxnxth.pdf
    • https://cdn.sqhk.co/petebeki/Ehghciu/sling_bag_vs_purse.pdf
    • https://cdn.sqhk.co/lirerafi/r29dAgc/mukijadikanuni.pdf
    • http://reduslim-italiaoficial.site/pmbok_6_trke_satn_alo91r4.pdf
    • http://alania365.ru/63597448816xur8u.pdf
    • https://cdn.sqhk.co/vikoparif/gd9hhgk/54294134985.pdf
    • http://cafechorsu.ru/bakexewoninunaboxakntnb7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fafaxuz.epizy.com/amd_ryzen_7_overclocking_guide.pdf
    • https://s3.amazonaws.com/muxegeza/57548982375.pdf
    • https://s3.amazonaws.com/xarojapi/present_perfect_progressive_tense_worksheets_with_answers.pdf
    • http://gegenig.epizy.com/no_answer_in_french.pdf
    • https://s3.amazonaws.com/wuniku/pepiziparetan.pdf
    • https://s3.amazonaws.com/mamukawaxatali/cutest_anime_wallpapers_for_android.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106c9.bin
d1b8db66d73aad3cad031f2b75828098e26d179ed4ae1dd42c5bf80f8098f0ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x106C9 5896 bytes
font_01_sfnt_off00011ae0.bin
a3c1e71ee267a56e07f4152271ee6f3e787816394c4165407b0fbfc463db2e41
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE0 10172 bytes