Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2025279e94b6e91…

MALICIOUS

PDF

72.2 KB Created: 2021-03-29 20:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 861aa098bb87af8878c2a8c2d276d126 SHA-1: c14f9f5fd5eea363694bcfb24e25f06dec5503e6 SHA-256: b2025279e94b6e91a5b670f03512c7c12fdffb3edb80d51296dc6bf25863a43b
156 Risk Score

Malware Insights

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

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 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://golowaki.ru/strik?utm_term=simile+and+metaphor+worksheet+year+3 PDF link annotation
    • https://wobanuwu.weebly.com/uploads/1/3/5/9/135959505/2318602.pdfIn PDF document text
    • https://sovajavab.weebly.com/uploads/1/3/4/0/134041947/gikufenutagodudop.pdfIn PDF document text
    • https://kidivine.weebly.com/uploads/1/3/4/5/134576756/ed719efb9e48e5.pdfIn PDF document text
    • https://xixusumer.weebly.com/uploads/1/3/0/8/130814933/zifovopuf-ginakaro-tosibemalit-sufap.pdfIn PDF document text
    • http://ruwufuwetoj.mygamesonline.org/75567313252.pdfIn PDF document text
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/xufafo-notulupotu.pdfIn PDF document text
    • http://rujitexoxobag.mypressonline.com/medical_laboratory_manual.pdfIn PDF document text
    • https://kezagoguz.weebly.com/uploads/1/3/4/1/134131769/60993b11f.pdfIn PDF document text
    • https://rejukikigukaw.weebly.com/uploads/1/3/5/3/135387704/2600572.pdfIn PDF document text
    • https://kajagutodadu.weebly.com/uploads/1/3/1/4/131437420/166312.pdfIn PDF document text
    • http://fozivot.mypressonline.com/69525325235.pdfIn PDF document text
    • http://tasiperop.medianewsonline.com/alternative_investments_caia_level_i.pdfIn PDF document text
    • https://lazarenebuf.weebly.com/uploads/1/3/4/8/134885148/d5ef11c995ed.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/lomiwexuva/kitchenaid_food_chopper_vs_food_processor.pdfIn PDF document text
    • http://xekabotiwuker.atwebpages.com/wenepedoj.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/sexuvosugolalivugituledom.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/jacobian_transformation_polar_coordinates.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/wutidizulo.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/21321523837.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/wosizozu.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/77147722154.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/happy_birthday_wishes_for_girlfriend_song.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/top_platform_games_xbox_one.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_off0000dc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9C 5724 bytes
SHA-256: 71e94078824509d375100ac5658388e7ce706e0efe58184c1992a1a93ceaaaef
font_01_sfnt_off0000f005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF005 10200 bytes
SHA-256: 2fa3344673a65048530e0de4b2d4c7e2bdb55ef967eaddc125941eb7010778e4

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