Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff7cfa2d7aa09a0…

MALICIOUS

PDF

80.4 KB Created: 2021-09-12 20:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 063c792cb12f3c7c43b7c9fb7cc3ef69 SHA-1: 436e040104ad66fee08d3251a189d7361b3ed01c SHA-256: bff7cfa2d7aa09a0718509f0bb354078e92baa06f6adc472fae3062b7d973bb1
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to potentially malicious or unknown domains, suggesting a phishing or malware distribution scheme. The 'SE_URGENCY_LURE' heuristic further supports a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://matchedtubes.de/userfiles/file/87898460467.pdf In PDF document text
    • http://theffirm.com/userfiles/file/77242902765.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/7532076940.pdfIn PDF document text
    • http://billsky.ee/files/file/15274353691.pdfIn PDF document text
    • http://pharmorgsyn.com/upload/files/temejuwajeguver.pdfIn PDF document text
    • http://cabini.it/userfiles/files/13830815561.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/64151201194.pdfIn PDF document text
    • http://xyr59.com/filespath/files/20210906011658.pdfIn PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/14055006933.pdfIn PDF document text
    • http://psycare-spb.com/userfiles/file/fidonijetofisonas.pdfIn PDF document text
    • https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/60108644052.pdfIn PDF document text
    • https://kirmatas.com/userfiles/file/41995096254.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/47753236525.pdfIn PDF document text
    • http://letnipohar.cz/upload/file/40737269001.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/nupajosodejuvo.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137bef977741---lidagedosafijawusokosoxe.pdfIn PDF document text
    • http://bankkartya.hu/js/ckfinder/userfiles/files/23963222924.pdfIn PDF document text
    • https://yuktogel.com/contents/files/todusukukugozu.pdfIn PDF document text
    • https://www.creativetalentnetwork.com/ckfinder/userfiles/files/45507867742.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/56389051428.pdfIn PDF document text
    • http://land89.com/ckupload/files/65546404045.pdfIn PDF document text
    • http://bordahusfeldolgozo.hu/editor_up/dazunu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=callipeg+app+for+androidPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA90 10440 bytes
SHA-256: 2abc9cf59fc29640364a2438e653015545f4ed4ed07d6dae44b44504e91b63ed
font_01_sfnt_off0000f20e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20E 16840 bytes
SHA-256: 6becd74ab5bc95c396a1cc53ebaafc004cf34f149fc0fc78d8af28de22b4bfd1
font_02_sfnt_off00011d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.