Malicious PDF — malware analysis report

Static analysis result for SHA-256 720ba68b15524e5b…

MALICIOUS

PDF

112.9 KB Created: 2021-03-23 04:11:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d9a740e4e260ffa2dd0e8eddb709030b SHA-1: a84a15a8bbcac867e409659da24490ad357feb6a SHA-256: 720ba68b15524e5b441e230ddeebd99e0c08a089c58ee72cb2803b87d064f72f
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a large number of external links, suggesting a link farm or phishing attempt. The ML classifier and ClamAV also identified it as malicious. While no scripts were explicitly extracted, the presence of numerous embedded URLs points towards an attempt to redirect users to potentially malicious sites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • 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://bologen.ru/award?keyword=amoeba+sisters+video+recap+of+mutations+answer+key+pdf PDF link annotation
    • http://weroserigo.22web.org/abilene_reporter_news_garage_sale_ads.pdfIn PDF document text
    • https://lobejimore.weebly.com/uploads/1/3/1/3/131383478/sowonabegof-nijaka.pdfIn PDF document text
    • https://murozukuzofapu.weebly.com/uploads/1/3/4/7/134716639/buzirebavojutux.pdfIn PDF document text
    • https://xikemusuvef.weebly.com/uploads/1/3/4/3/134322181/xomofubixulexunebi.pdfIn PDF document text
    • https://nasoluludeg.weebly.com/uploads/1/3/4/4/134435301/galam.pdfIn PDF document text
    • https://togolotokafusaf.weebly.com/uploads/1/3/5/2/135294136/2b640a.pdfIn PDF document text
    • https://doxuvufunufake.weebly.com/uploads/1/3/0/8/130874670/donoj_juxes.pdfIn PDF document text
    • https://tilawifi.weebly.com/uploads/1/3/4/4/134480999/kagoloxekejusugax.pdfIn PDF document text
    • https://rofasaxoropop.weebly.com/uploads/1/3/5/3/135316675/tuwepe.pdfIn PDF document text
    • http://movikewenatorug.iblogger.org/a1c_ada_guidelines.pdfIn PDF document text
    • https://fadefufogu.weebly.com/uploads/1/3/5/9/135960472/kazogutefijajenitef.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/dejazuvorira/marine_archaeology_in_india.pdfIn PDF document text
    • https://9fbeb193-358d-48fe-b9d9-45f8b63f6b3c.filesusr.com/ugd/ab67b9_2e03b2995e7244b8be1763b45824cfe4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/a_savita_marathi_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/benokotopufi.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/53818771639.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/26898503406.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/fundraising_thermometer_printable_template.pdfIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_8834ca8d9e7b46b4a21b39013552bcc8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tezude/kovesuw.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/firefox_47._1.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/dorezovadikuxuxizavikidaw.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/sudodomobo.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16747 6440 bytes
SHA-256: edf517a561ed5132c6c1d5718ac6ff9d870a00e6f43a91762fd168a2279cca75
font_01_sfnt_off0001773d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1773D 5716 bytes
SHA-256: a3a0971b8468cdd03f7569fbbdaeb33d434d47994efd7b21bf87f9c172bf5461
font_02_sfnt_off00018ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AB9 11964 bytes
SHA-256: b8d31358a8e34eb82835bb1c1b3c9d115a83d07a62b1cbf250395a10c4c550c5

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