Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a45f8fb79e6e4c…

MALICIOUS

PDF

102.3 KB Created: 2021-04-06 17:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e09759daa010bbb255b998a354d6d02 SHA-1: 77d812cbf630b37dc9a1bdb1d77435a36c83072b SHA-256: 94a45f8fb79e6e4cb6ea4a9e307dbc610da4320c3c72b4a502cd85f5017be048
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external links, including one pointing to 'seumenha.ru', suggests a phishing or malware distribution scheme. The heuristic 'SE_DOWNLOAD_BUTTON' further supports the idea that the document is designed to trick users into clicking a link to download potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/wix?keyword=download+pandora+patched+apk
    • https://cdn-cms.f-static.net/uploads/4417997/normal_602c14ce025e3.pdf
    • https://tukumexof.weebly.com/uploads/1/3/4/7/134721389/028b0d58451.pdf
    • http://purpless.vip/1987_ezgo_marathon_wiring_diagram5uxi4.pdf
    • http://vulgargirls.fun/drugs_safe_in_pregnancy_chartb2log.pdf
    • https://static.s123-cdn-static.com/uploads/4530868/normal_5ffa30a028970.pdf
    • https://cdn-cms.f-static.net/uploads/4481509/normal_602941af4dca5.pdf
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/cee86e2982e5.pdf
    • https://lexizade.weebly.com/uploads/1/3/4/3/134368494/0b36b3c7.pdf
    • https://cdn-cms.f-static.net/uploads/4453885/normal_600feffc51bc2.pdf
    • https://kuwevezutasozif.weebly.com/uploads/1/3/0/9/130969868/5ec94aeac1.pdf
    • http://rastet-malysh.ru/ligawatvzax.pdf
    • https://lupawepenotude.weebly.com/uploads/1/3/1/6/131606523/91bac481a7966a.pdf
    • https://kezopepeza.weebly.com/uploads/1/3/4/3/134332650/8466259.pdf
    • https://gimiduti.weebly.com/uploads/1/3/4/7/134711596/436416.pdf
    • https://cdn-cms.f-static.net/uploads/4486365/normal_5fe7c02c20dfb.pdf
    • https://zitidatuviwe.weebly.com/uploads/1/3/4/4/134493200/3bcbcda047df.pdf
    • http://blaugrana.ru/2006473286l23pt.pdf
    • http://choosenews.space/32094931910mzjlp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cffed81c-3f93-450d-bfe5-6f4b761d3e6f/2008_dodge_avenger_rt_motor_oil.pdf
    • https://uploads.strikinglycdn.com/files/9e34fcfd-98c5-4d91-b76d-bcdb9b89a40d/epson_v600_review_youtube.pdf
    • https://uploads.strikinglycdn.com/files/10def054-b0bb-480d-8c18-187b70357e3c/23048215436.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e82.bin
629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E82 6440 bytes
font_01_sfnt_off00012e76.bin
1865a3a47a7335c0b8210a54ea67799b2a9eaa1be164784d583ad7615db33cbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E76 5136 bytes
font_02_sfnt_off00013ff9.bin
c2a87bde077900e7b364688183468375223b88adcd7f119956410c758b01f9f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF9 2000 bytes
font_03_sfnt_off00014980.bin
b990f3e5c875d6ad30c49179e9cdd46bd0fbbbb3417336bbbacdb627ab2bcf05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14980 12660 bytes
font_04_sfnt_off0001750b.bin
084b6525a893e69d1bc92d5d56ed029cdb86f7dfb8a5b342fbb9bbd0cc07adc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1750B 16248 bytes

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