Malicious PDF — malware analysis report

Static analysis result for SHA-256 78149fc09401040d…

MALICIOUS

PDF

86.6 KB Created: 2021-03-31 08:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 89b4911ff17b7e4243309a20293bfe8e SHA-1: 549d2e49ffa93f8e3f74d7e9786d6853c567d96c SHA-256: 78149fc09401040dbac37be8b3288a5ba7bdb9547a58de270361f0de8bab2b68
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 0.9992

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://midufefew.ru/strik?utm_term=what+is+the+best+coffee+maker+with+built+in+grinder PDF link annotation
    • http://liwexun.mywebcommunity.org/elementary_korean_download.pdfIn PDF document text
    • http://larebalin.mypressonline.com/how_to_replace_the_bottom_element_in_a_kenmore_oven.pdfIn PDF document text
    • http://jixazepo.mywebcommunity.org/my_samsung_smart_tv_wont_stay_connected_to_the_internet.pdfIn PDF document text
    • http://kifejuja.medianewsonline.com/vavoluxoki.pdfIn PDF document text
    • http://wowit.pro/crunchyroll_online_store_coupon6cgyr.pdfIn PDF document text
    • http://creditreportfast.info/how_much_is_chromebook_in_the_philippinesis48a.pdfIn PDF document text
    • http://nawitebexu.medianewsonline.com/subetomipinarumuxe.pdfIn PDF document text
    • http://japamawosoj.mygamesonline.org/suwulemum.pdfIn PDF document text
    • http://duwadomet.22web.org/android_bottom_navigation_bar_disable_animation.pdfIn PDF document text
    • http://zofunubesosena.mypressonline.com/export_to_word_mac_preview.pdfIn PDF document text
    • http://cleanup-sale.site/muvogoliwzwle.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/marvel_comics_free_download_in_tamil.pdfIn PDF document text
    • http://savadaqwe.space/how_long_to_dehydrate_ground_deer_jerky_in_dehydrator64q6a.pdfIn PDF document text
    • http://mukinumatonewo.getenjoyment.net/44632450821.pdfIn PDF document text
    • http://memubalejegezur.66ghz.com/preposition_worksheet_grade_1.pdfIn PDF document text
    • http://sportita.fun/ariens_520_oil_capacity6vooz.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/dotivaf/lobamod.pdfIn PDF document text
    • http://doliwoxebokuk.rf.gd/75299917544.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/nainital_tour_guide.pdfIn PDF document text
    • http://lojogonofar.rf.gd/math-_aids_combining_like_terms_answer_key.pdfIn PDF document text
    • http://dowafirowelumex.atwebpages.com/wofafoxinogogokiwuxen.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/masked_singer_peacock_performance_episode_2.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/fisher_price_baby_swing_motor_not_working.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_off0001132c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132C 5744 bytes
SHA-256: 8547ce18d9d6895afb52edbe21d47b07636719e29c2cce59c5fabc9c7d38d8e0
font_01_sfnt_off000126ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AD 11256 bytes
SHA-256: 189be9de55e4500e23114338f8aee60b55e38101d010ca36970c71bcad3c1ee7

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