Malicious PDF — malware analysis report

Static analysis result for SHA-256 70bd95deabb276d6…

MALICIOUS

PDF

68.8 KB Created: 2020-03-30 12:19:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0ca322977b740893860206418badf8fa SHA-1: c8449aff35d122a7e2ee2799f1f132c5f3b9ec2d SHA-256: 70bd95deabb276d6c9fe154ee2749f88a4ffd9d7d6a273fa8a993250e2f159e9
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to redirect users. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of numerous external URLs indicates a likely attempt to host malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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 http://sta-66-99-58-206.ladse.org/uploads/1/3/0/4/130435511/130435511.html#other+right+shoulder+sprain+icd+10
    • http://partywithapurposeuth4mdgs.com/uploads/1/3/0/6/130604338/vuboponovojez.pdf
    • http://oblivionstudios.net/uploads/1/3/0/7/130776699/92b4b3.pdf
    • http://skydiversonly.com/uploads/1/3/1/1/131163943/4893626.pdf
    • http://vousenprie.net/uploads/1/3/0/6/130620783/3361dde9e2.pdf
    • http://neurohorizonpharma.com/uploads/1/3/0/9/130968976/4879707.pdf
    • http://killianhsmusic.com/uploads/1/3/0/8/130874108/jidizilife-zenilelufo-zufabod-kivisigepe.pdf
    • http://wildlightceramics.com/uploads/1/3/1/4/131408033/4481790.pdf
    • http://newmissnow.com/uploads/1/3/0/2/130287521/522176340.pdf
    • http://gladstonegetaway.info/uploads/1/3/0/9/130969714/9474134.pdf
    • http://f8tailfitness.com/uploads/1/3/0/4/130483806/goxizepetoxipitokati.pdf
    • http://mediumlaurenbortolamirobbins.com/uploads/1/3/0/4/130483294/wuzijopifesamo.pdf
    • http://hostmaster.bruar-kelpies.com/uploads/1/3/1/3/131398295/2703946.pdf
    • http://theshedcamp.com/uploads/1/3/0/4/130436431/6661449.pdf
    • http://compralue.com/uploads/1/3/0/6/130639310/lotepalatuwudagetika.pdf
    • http://thesweethi.com/uploads/1/3/0/5/130539494/vajuletubemusu_xepufezozu.pdf
    • http://gclub.lucky1st.com/uploads/1/3/0/7/130739324/350727f2eb9e.pdf
    • http://theacaparty.com/uploads/1/3/0/6/130603838/b4ba8.pdf
    • http://voicesofspirits.com/uploads/1/3/0/7/130740338/xefek-monisefif.pdf
    • http://woodlovefurniture.ca/uploads/1/3/0/9/130969535/nawejufuv_pikazenikufuw.pdf
    • http://lamaj.nyc/uploads/1/3/0/7/130776343/2020602.pdf
    • http://mta-sts.dekaping.nl/uploads/1/3/0/6/130620677/6763177.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e703.bin
e9040800a5a760be741f643cca42cd11db9975472e405835b06d637f5473cab0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE703 7616 bytes