Malicious PDF — malware analysis report

Static analysis result for SHA-256 459def68b7d636bc…

MALICIOUS

PDF

40.8 KB Created: 2020-05-15 21:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 0204e6cf30fc3dd749f18f6d4cf80e72 SHA-1: 7981e9b1bca2ec0db2e3bd4786881eae416e946c SHA-256: 459def68b7d636bcaa64cb11359ef955713d2d3d24f908492baa1c20d66a0c26
136 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are numerically or generically named PDFs hosted on various domains. The document body presents a deceptive error message related to Android development to trick users into clicking these links. The primary lure appears to be the 'error android_sdk_root is undefined android studio' message, directing users to a specific URL that likely hosts further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://mindfulnessbrigade.com/uploads/1/3/1/4/131407855/131407855.html#error+android_sdk_root+is+undefined+android+studio PDF link annotation
    • http://waicana.com/uploads/1/3/0/5/130538953/9bfaeb23ab05714.pdfIn PDF document text
    • http://gregoryjosephlujan.com/uploads/1/3/0/9/130969639/6376271.pdfIn PDF document text
    • http://malaguttidesigns.com/uploads/1/3/1/4/131406020/8812536.pdfIn PDF document text
    • http://kandiddesign.com/uploads/1/3/0/6/130604112/c08601e2c52.pdfIn PDF document text
    • http://nibbleincbakingco.com/uploads/1/3/0/4/130435987/5aef4.pdfIn PDF document text
    • http://belmontrealestate.net/uploads/1/3/0/4/130483322/18b46e9cf80a24.pdfIn PDF document text
    • http://adoptadapt.com/uploads/1/3/0/8/130813644/9680127.pdfIn PDF document text
    • http://spicesdepot.com/uploads/1/3/0/7/130776589/ferimulebala.pdfIn PDF document text
    • http://achsp.org/uploads/1/3/0/6/130639849/jirej.pdfIn PDF document text
    • http://encuentrosclub.com/uploads/1/3/0/6/130621850/xojezakifozesofam.pdfIn PDF document text
    • http://atlwomentowomen.com/uploads/1/3/1/1/131164471/6788491.pdfIn PDF document text
    • http://parkwayandoakwoodvistafinancing.com/uploads/1/3/0/4/130476738/4f641bdde9b4d17.pdfIn PDF document text
    • http://kelliceswaggerty.com/uploads/1/3/0/8/130814337/wetimisexale.pdfIn PDF document text
    • http://peacemvmt.com/uploads/1/3/1/6/131637311/mazenokosini.pdfIn PDF document text
    • http://classiestcritter.com/uploads/1/3/1/4/131454178/3294744.pdfIn PDF document text
    • http://shenandoahdevelopment.com/uploads/1/3/0/8/130813428/jetudo.pdfIn PDF document text
    • http://gateway1cafe.com/uploads/1/3/0/2/130289424/fd70f527d80a7df.pdfIn PDF document text
    • http://explorgraphy.com/uploads/1/3/1/4/131438113/wapufupeb.pdfIn PDF document text
    • http://andreajclphotography.com/uploads/1/3/0/6/130605278/d58bc.pdfIn PDF document text
    • http://cairnscloudsolutions.com/uploads/1/3/0/9/130970023/4204969.pdfIn PDF document text
    • http://infoprotech.net/uploads/1/3/0/3/130323181/f3760f50b94.pdfIn PDF document text
    • http://hulaforhorsemanship.com/uploads/1/3/0/7/130776511/rivowujoleregup.pdfIn PDF document text
    • http://baileyaustinfilm.com/uploads/1/3/0/2/130271072/6783691.pdfIn PDF document text
    • http://elligen.net/uploads/1/3/0/4/130483499/suderuwoteve.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

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_off00006ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFD 11464 bytes
SHA-256: 663ac4679d621411535c8ab8fc8556471fe847d5121582301ed23989235b176d

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