Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e408118a6e10080…

MALICIOUS

PDF

76.6 KB Created: 2021-03-22 21:45:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a76e9f36c05f4a123cacbd21846ff36a SHA-1: ba46246d5fbac2229cf2e34d8e288efe9a4ce9c6 SHA-256: 5e408118a6e10080e5a260fe9a3b9172c1cda3343f73aec040c320eb64771675
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URIs, with one specifically identified as an external URI pointing to 'https://pelibifir.ru/wix?keyword=the+story+of+stuff+summary'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of numerous links suggests a link farm or redirection mechanism to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/wix?keyword=the+story+of+stuff+summary
    • http://dress-russia.ru/wine_enthusiast_wine_refrigerator_reviewscup02.pdf
    • https://cdn.sqhk.co/losomilodip/ALjfieN/apple_infinite_loop_campus.pdf
    • http://venulejow.iblogger.org/forawiratogaxobutexanozun.pdf
    • https://cdn-cms.f-static.net/uploads/4469623/normal_60532723c7452.pdf
    • https://static.s123-cdn-static.com/uploads/4466146/normal_5fe236de6ff38.pdf
    • http://idealslimitalia-official.site/53200063077sjwgz.pdf
    • http://cmb-eco.com/7196693981v9tmv.pdf
    • http://lixidavek.22web.org/pokemon_y_guide_bulbapedia.pdf
    • https://cdn.sqhk.co/sitopizol/ififhh2/xizaxojugebixeforewe.pdf
    • https://static.s123-cdn-static.com/uploads/4460466/normal_5ffb6a445c420.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/367591fb-9001-40c9-ab0e-d1465c15a78f/diary_of_a_wimpy_kid_full_movie_dog_days_online_free.pdf
    • http://pudedenos.epizy.com/un_trusteeship_council.pdf
    • http://zuzasuzojenox.epizy.com/can_someone_with_celiac_disease_die_from_eating_gluten.pdf
    • http://kajiwuze.rf.gd/how_to_get_pearson_access_code.pdf
    • https://uploads.strikinglycdn.com/files/1e3a2fc2-67b1-41d2-a960-c506357e6f67/troy_bilt_push_mower_fuel_filter.pdf
    • https://uploads.strikinglycdn.com/files/cb7e0dea-250a-4342-a106-b4e3a4d1ce4d/41201992694.pdf
    • https://uploads.strikinglycdn.com/files/84648ee1-b1f8-415a-9e48-44e14164fe8c/38101876407.pdf
    • http://zefitog.epizy.com/what_streaming_service_will_news_of_the_world_be_on.pdf
    • https://uploads.strikinglycdn.com/files/8f1f8c39-61f0-4a31-ad47-cfb1efed81ff/madedufezodarifa.pdf
    • http://zewomasajeguzud.epizy.com/ayyappa_telugu_songs_harivarasanam_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4b2.bin
47bf2f3c2eb2107346b537f80d78eacf9bbc3f1cba120d71821538da63221bd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B2 4756 bytes
font_01_sfnt_off0000f4db.bin
fa03ef9b1c9b82db4f01f5a33d5de9d28b3c0145da245f87eacc9ce0613120b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DB 10036 bytes
font_02_sfnt_off00011750.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11750 4324 bytes

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