Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcdf1f3998f00b60…

MALICIOUS

PDF

36.6 KB Created: 2020-03-21 15:15:22 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: d855fe002b151aab99c5e1a4c28b3b8a SHA-1: 67dbc620e1e3944e9fdd8ec74e33e448bdc81589 SHA-256: dcdf1f3998f00b6032671683b43fdbb25f032ba0860f47f29a1768eb132058f2
104 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body also contains embedded URLs, such as http://ttmusb.com/uploads/1/3/0/6/130621353/130621353.html#insinkerator+pro+880+specs, which points to a PDF file. This suggests a link farm or SEO spamming technique, potentially used to distribute malicious content or drive traffic to compromised sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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 http://ttmusb.com/uploads/1/3/0/6/130621353/130621353.html#insinkerator+pro+880+specs PDF link annotation
    • http://roomkandi.com/uploads/1/3/0/7/130740351/a4a280fc3659a4b.pdfIn PDF document text
    • http://u-hub.co.uk/uploads/1/3/0/8/130813025/9f13807df5143.pdfIn PDF document text
    • http://webdisk.grewbuilding.com/uploads/1/3/0/6/130604892/6905313.pdfIn PDF document text
    • http://theforagedfern.com/uploads/1/3/0/4/130435875/jowikekufojar.pdfIn PDF document text
    • http://melatonindosierungen.com/uploads/1/3/0/2/130288915/zibopozopalofavobago.pdfIn PDF document text
    • http://prime-windows.com/uploads/1/3/0/2/130289779/nazokipeso.pdfIn PDF document text
    • http://hostmaster.zumbafitnesslondon.co.uk/uploads/1/3/0/7/130739557/8431102.pdfIn PDF document text
    • http://ghostwriterforyou.net/uploads/1/3/0/4/130488839/damatij.pdfIn PDF document text
    • http://www.phoenix-exchange.com/uploads/1/3/0/4/130435905/nawositegogibamuro.pdfIn PDF document text
    • http://www.anthonycarrphotographystudio.com/uploads/1/3/0/3/130379098/d4256c06543.pdfIn PDF document text
    • http://muzo-emeralds.net/uploads/1/3/0/7/130740015/xedixisakume.pdfIn PDF document text
    • http://meraki-trading.com/uploads/1/3/0/8/130874031/sitovitigu.pdfIn PDF document text
    • http://apoaaxi.org/uploads/1/3/0/7/130775109/narufokefelasakavola.pdfIn PDF document text
    • http://newarkvalleychamber.com/uploads/1/3/0/6/130621334/botaxo_zezilu_texumazuwu_jexukekoko.pdfIn PDF document text
    • http://kwildphoto.com/uploads/1/3/0/2/130288775/9831329.pdfIn PDF document text
    • http://molexastucco.com/uploads/1/3/0/5/130588617/wevegupibigop.pdfIn PDF document text
    • http://ctsf.us/uploads/1/3/0/4/130489159/zuloxi.pdfIn PDF document text
    • http://livingwholeandthriving.com/uploads/1/3/0/3/130379428/xorazegajoguwo.pdfIn PDF document text
    • http://rx4retirement.info/uploads/1/3/0/4/130483309/nesikepizuvabidedumi.pdfIn PDF document text
    • http://10komobile.net/uploads/1/3/0/2/130270932/varik.pdfIn PDF document text
    • http://mta-sts.mail.humanityxteam.org/uploads/1/3/0/5/130588842/8990007.pdfIn PDF document text
    • http://www.libreastfeeding.com/uploads/1/3/0/8/130814143/tejobovasitub_gimiwokaf_fejolojuj_kidugokesi.pdfIn PDF document text
    • http://sophiashousefamilyrestaurant.com/uploads/1/3/0/3/130323162/e2b85c836ff.pdfIn PDF document text
    • http://www.mybdtc.com/uploads/1/3/0/6/130605324/853e782.pdfIn PDF document text
    • http://mendingrootsdesigns.com/uploads/1/3/0/5/130540926/matidinukejil.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6776 7796 bytes
SHA-256: f455fad2d0555d57331daf201c92b040c551e23db4eefef5947e324a15ab4ae4

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