Malicious PDF — malware analysis report

Static analysis result for SHA-256 97978e6f8db9b65d…

MALICIOUS

PDF

83.8 KB Created: 2021-03-14 09:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e65869246cb83f9e72a62eac572143b SHA-1: ed4f4d01676fb7c7f210938fd7c4875959ff985d SHA-256: 97978e6f8db9b65d7e7c3c0ee460f727b1a1cf638cd082decfec2a4fbce15097
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, and detected by ClamAV as Pdf.Phishing.Trojan. The presence of numerous external links, many with SEO-like keywords, suggests an attempt to direct users to malicious websites. While no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://leonvi.ru/award?keyword=adaptive+control+tutorial+pdf
    • http://ru-dev.xyz/is_mechanical_pencil_lead_dangerousl1tym.pdf
    • http://drovazvenigorod.ru/how_to_start_writing_a_love_story_booknhwlu.pdf
    • http://bometaximom.scienceontheweb.net/9164060970.pdf
    • https://cdn.sqhk.co/jojojidatun/gighXih/darekabekuwirutiromi.pdf
    • https://cdn.sqhk.co/jagapifa/XdhCgcZ/red_ball_10000_oyna.pdf
    • https://cdn.sqhk.co/zuzipogowita/erbiaja/traffic_rider_hack_version_download_for_pc.pdf
    • http://vowitufafuzebil.scienceontheweb.net/zufifunugetavuravofatiz.pdf
    • http://napowojeba.medianewsonline.com/international_marketing_group_complaints.pdf
    • https://cdn.sqhk.co/vupapevixu/geqgggg/large_slotted_spoon_definition.pdf
    • http://goods-amzon.com/libro_de_algebra_y_geometria_analitica_kozak_descargarnh3ug.pdf
    • https://cdn.sqhk.co/xenivoronizu/jjghyeD/minion_rush_despicable_me_official_game_mod_apk.pdf
    • http://gexopidikimo.mygamesonline.org/12718537578.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nebojemesiwi.atwebpages.com/bali_itinerary_4_days.pdf
    • https://s3.amazonaws.com/zuniverijesud/how_to_remove_safewatch_pro_3000.pdf
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_01ff01b7ff6b45548748171f25325cb4.pdf?index=true
    • https://s3.amazonaws.com/woxojuxafopuv/40632252134.pdf
    • https://s3.amazonaws.com/lolaritemukole/misesixevegezava.pdf
    • https://e0fa0743-814d-41de-b6a5-47f787911882.filesusr.com/ugd/89d2ef_ea7904965aa3483497f7ca2d0fd04343.pdf?index=true
    • https://s3.amazonaws.com/faxaxos/arduino_mega_adk_tutorial.pdf
    • https://s3.amazonaws.com/negonanopix/mobile_legends_adventure_mod_apk_free_shopping.pdf
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_86a882917c224aff948a7df3549188c6.pdf?index=true
    • https://s3.amazonaws.com/metakibeme/1024799411.pdf
    • https://s3.amazonaws.com/tulosa/html_template_engine_best.pdf
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_a1f530172cc14d99ab62d834163b541c.pdf?index=true
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_88735175fb0f4fe196d2ae4b74018909.pdf?index=true
    • https://s3.amazonaws.com/nunakixuma/xuxezegejid.pdf
    • https://s3.amazonaws.com/jenagubadopi/pijaj.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f67c.bin
a5e5c27a2f3e47995b745f7f0003b996deda6e0cacef33388aacaef3641814a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF67C 5020 bytes
font_01_sfnt_off000107aa.bin
20ef60028ebed208c52870f021cee577d6cfc2dc8a0a2d33361c5140a7fe5459		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107AA 11192 bytes
font_02_sfnt_off00012c95.bin
2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C95 16060 bytes

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