Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9a42641b880d054…

MALICIOUS

PDF

79.8 KB Created: 2021-02-28 07:13:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c5a413035050dd657997006bef6cd808 SHA-1: 95080030e5d7d7965f6f6c2727843222ac062ef6 SHA-256: c9a42641b880d0540c5f6147d959492385aef7f7154d52995a4c3227223cdc81
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://mezovuduw.ru/123?utm_term=how+to+use+a+stanley+500+amp+jump+starter PDF link annotation
    • http://klossheff.xyz/el_anillo_de_los_nibelungos_pelicula_online_espaol_latinoyjdvb.pdfIn PDF document text
    • http://bet-info.ru/can_you_add_vicks_to_vaporizeres1af.pdfIn PDF document text
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/rotefezafoj-pirogonalidu.pdfIn PDF document text
    • https://cdn.sqhk.co/zikonidenijo/qdgfZiE/kemopulabedijodifukebema.pdfIn PDF document text
    • http://organicsss.space/kepijelarixexiruwajee1njj.pdfIn PDF document text
    • http://ighelperscenter.com/hanping_cantonese_dictionary_pro_apknd4ij.pdfIn PDF document text
    • http://mediaverifiedbadge.com/battlefront_2_max_rank69c6y.pdfIn PDF document text
    • https://cdn.sqhk.co/naliwanik/5o1HnXp/34483346683.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/hmLsjc0/tunupibezosikarodegub.pdfIn PDF document text
    • http://trend-sales.fun/srs_root_apk_download_apkpure5mpr2.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/ghmqGb2/best_dance_songs_of_the_90s_and_2000s.pdfIn PDF document text
    • http://podeves.xyz/sky_force_game_2004urxr9.pdfIn PDF document text
    • https://dojebuxepoviguf.weebly.com/uploads/1/3/1/4/131407435/voperibuniru.pdfIn PDF document text
    • http://avit0.cc/8097593042884z96.pdfIn PDF document text
    • http://wizudaneku.iblogger.org/how_to_get_local_channels_on_dish_wally.pdfIn PDF document text
    • https://vebuxevofarina.weebly.com/uploads/1/3/4/0/134013543/nebefekuwabipot.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fekobovovexi.epizy.com/ssms_tools_format_sql.pdfIn PDF document text
    • http://rotaduwifomol.rf.gd/853230639.pdfIn PDF document text
    • http://sobogasitizi.epizy.com/38781582558.pdfIn PDF document text
    • http://dinetekip.epizy.com/2006_6.0_powerstroke_hp_and_torque.pdfIn PDF document text
    • http://pumukozozuzife.epizy.com/rare_candy_cheat_pokemon_fire_red_android.pdfIn PDF document text
    • http://muxomak.epizy.com/quadratic_equation_graphing_problems.pdfIn PDF document text
    • http://bit.ly/37VYZkxIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000fe76.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFE76 3572 bytes
SHA-256: d878ad1eda93d8bff5998932762ff29f068b4f97138b684301e144a97064adac
font_00_sfnt_off0000ebe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE4 5460 bytes
SHA-256: 919209a85f9fae713116ed269139c49a50d10e6868deb60a9c2003f7fcfbbcb0
font_02_sfnt_off00010be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE2 10804 bytes
SHA-256: 07262f1fd0bc00f4d78c1bf13755e05d079727eb0c64d08d3cfec2a00b075510